Part II - Mileage - Engineering Data - Interstate System - Highway History

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In 1998, with the Interstate System essentially complete, FHWA's Office of Engineering compiled information about development of the program. In making this information available to the public, we have not updated the material. All information is as of 1998 when the Office of Engineering compiled the report.

The Dwight D. Eisenhower System of Interstate and Defense Highways

Part II - Mileage

Summary

Dwight D. Eisenhower System of Interstate & Defense Highways Route Summary as of 12/31/97
Mileage Designation	Main Routes	Loops	Spurs	Total
23 USC 103(e)	38,963.40	2,741.47	1,089.62	42,794.49
23 USC 139(a)	1,182.34	493.33	432.66	2,108.33
NHS Act	109.70	--	--	109.70
Miles That Overlap Other Routes	1,045.45	35.77	--	1,081.22
TOTAL Length Including Overlap	41,300.89	3,270.57	1,522.28	46,093.74
NET Length Excluding Overlap	40,255.44	3,234.80	1,522.28	45,012.52
Number of Routes	66	130	104	300
Footnotes: 23 USC 103(e) mileage is designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S. Code and most was constructed with 90 percent Federal-Aid Interstate Construction funds. 23 USC 139(a) mileage is designated under Section 139(a) of Title 23 and was built without Interstate Construction fund participation. NHS Act routes were added in accordance with Section 332(a) of the NHS Act of 1995. Overlap mileage is included in the Total Length of each overlap route. NET Lengths only include the overlap mileage once, as assigned to the predominant route.

Interstate Routes and Their Lengths (in miles)
State	Interstate Route No	"CHARGEABLE" MILEAGE			"N0N-CHARGEABLE" MILEAGE		Mileage of Other Overlapping Routes	Overlap Route Number	Net Length w/o Overlap (Miles)	Total Length (Miles)
State	Interstate Route No	Original 42,500 Miles 23 USC 103(e)(1),(3)	Howard-Cramer Additions 23 USC 103(e)(2)	Subtotal 103e(1),(2)(3)	Miles Added Under 23 USC 139(a)	High Priority Route Additions per NHS Act	Mileage of Other Overlapping Routes	Overlap Route Number	Net Length w/o Overlap (Miles)	Total Length (Miles)
AL	10	66.30	--	66.30	--	--	--		66.30	66.30
AL	20	84.60	--	84.60	--	--	130.10	I-59	84.60	214.70
AL	59	241.40	---	241.40	---	---	---		241.40	241.40
AL	65	367.00	---	367.00	---	---	---		367.00	367.00
AL	85	80.00	---	80.00	---	---	---		80.00	80.00
AL	165	4.90	---	4.90	---	---	---		4.90	4.90
AL	359	2.30	---	2.30	---	---	---		2.30	2.30
AL	459	32.80	---	32.80	---	---	---		32.80	32.80
AL	565	21.40	---	21.40	---	---	---		21.40	21.40
AL	759	4.50	---	4.50	---	---	---		4.50	4.50
AL	10 Routes	905.20	0.00	905.20	0.00	0.00	130.10		905.20	1,035.30

AZ	8	178.32	---	178.32	---	---	---		178.32	178.32
AZ	10	391.94	---	391.94	---	---	---		391.94	391.94
AZ	15	29.37	---	29.37	---	---	---		29.37	29.37
AZ	17	145.24	---	145.24	---	---	---		145.24	145.24
AZ	19	63.35	---	63.35	---	---	---		63.35	63.35
AZ	40	359.23	---	359.23	---	---	---		359.23	359.23
AZ	6 Routes	1,167.45	0.00	1,167.45	0.00	0.00	0.00		1,167.45	1,167.45

AR	30	143.08	---	143.08	---	---	---		143.08	143.08
AR	40	284.80	---	284.80	---	---	---		284.80	284.80
AR	55	70.00	---	70.00	---	---	2.22	I-40	70.00	72.22
AR	430	12.93	---	12.93	---	---	---		12.93	12.93
AR	440	---	---	0.00	9.96	---	---		9.96	9.96
AR	540	8.13	---	8.13	5.97	---	---		14.10	14.10
AR	630	7.40	---	7.40	---	---	---		7.40	7.40
AR	7 Routes	526.34	0.00	526.34	15.93	0.00	2.22		542.27	544.49

CA	5	797.01	---	797.01	---	---	---		797.01	797.01
CA	8	170.00	---	170.00	---	---	---		170.00	170.00
CA	10	240.90	---	240.90	---	---	1.60	I-5	240.90	242.50
CA	15	287.30	---	287.30	---	---	---		287.30	287.30
CA	40	154.60	---	154.60	---	---	---		154.60	154.60
CA	80	202.20	---	202.20	---	---	---		202.20	202.20
CA	105	10.30	7.00	17.30	---	---	---		17.30	17.30
CA	110	20.50	---	20.50	---	---	---		20.50	20.50
CA	205	13.00	---	13.00	---	---	---		13.00	13.00
CA	210	48.60	---	48.60	---	---	---		48.60	48.60
CA	215	---	---	0.00	54.50	---	---		54.50	54.50
CA	238	---	---	0.00	2.10	---	---		2.10	2.10
CA	280	57.10	---	57.10	---	---	---		57.10	57.10
CA	305	5.30	---	5.30	---	---	---		5.30	5.30
CA	380	3.30	---	3.30	---	---	---		3.30	3.30
CA	405	72.40	---	72.40	---	---	---		72.40	72.40
CA	505	32.90	---	32.90	---	---	---		32.90	32.90
CA	580	68.40	---	68.40	7.30	---	---		75.70	75.70
CA	605	27.40	---	27.40	---	---	---		27.40	27.40
CA	680	58.00	---	58.00	12.50	---	---		70.50	70.50
CA	710	---	---	0.00	19.70	---	---		19.70	19.70
CA	780	6.50	---	6.50	---	---	---		6.50	6.50
CA	805	28.00	---	28.00	---	---	---		28.00	28.00
CA	880	---	---	0.00	44.70	---	---		44.70	44.70
CA	980	0.80	---	0.80	1.00	---	---		1.80	1.80
CA	25 Routes	2,304.51	7.00	2,311.51	141.80	0.00	1.60		2,453.31	2,454.91

CO	25	298.94	---	298.94	---	---	---		298.94	298.94
CO	70	450.30	---	450.30	---	---	---		450.30	450.30
CO	76	184.14	---	184.14	---	---	---		184.14	184.14
CO	225	12.18	---	12.18	---	---	---		12.18	12.18
CO	270	5.20	---	5.20	---	---	---		5.20	5.20
CO	5 Routes	950.76	0.00	950.76	0.00	0.00	0.00		950.76	950.76

CT	84	98.52	---	98.52	---	---	---		98.52	98.52
CT	91	57.98	---	57.98	---	---	---		57.98	57.98
CT	95	111.57	---	111.57	---	---	---		111.57	111.57
CT	291	5.88	---	5.88	---	---	---		5.88	5.88
CT	384	7.40	---	7.40	---	---	---		7.40	7.40
CT	395	---	---	0.00	54.69	---	---		54.69	54.69
CT	684	1.40	---	1.40	---	---	---		1.40	1.40
CT	691	1.60	6.69	8.29	---	---	---		8.29	8.29
CT	8 Routes	284.35	6.69	291.04	54.69	0.00	0.00		345.73	345.73

DE	95	23.43	---	23.43	---	---	---		23.43	23.43
DE	295	5.71	---	5.71	---	---	---		5.71	5.71
DE	495	11.47	---	11.47	---	---	---		11.47	11.47
DE	3 Routes	40.61	0.00	40.61	0.00	0.00	0.00		40.61	40.61

DC	66	1.11	---	1.11	---	---	---		1.11	1.11
DC	95	0.12	---	0.12	---	---	---		0.12	0.12
DC	295	7.72	---	7.72	---	---	---		7.72	7.72
DC	395	3.49	---	3.49	---	---	---		3.49	3.49
DC	695	1.21	---	1.21	---	---	---		1.21	1.21
DC	5 Routes	13.65	0.00	13.65	0.00	0.00	0.00		13.65	13.65

FL	4	132.06	---	132.06	---	---	---		132.06	132.06
FL	10	362.82	---	362.82	---	---	---		362.82	362.82
FL	75	425.75	46.31	472.06	---	---	---		472.06	472.06
FL	95	382.40	---	382.40	---	---	---		382.40	382.40
FL	110	6.39	---	6.39	---	---	---		6.39	6.39
FL	175	---	---	0.00	1.44	---	---		1.44	1.44
FL	195	4.41	---	4.41	---	---	---		4.41	4.41
FL	275	59.58	---	59.58	---	---	---		59.58	59.58
FL	295	35.06	---	35.06	---	---	---		35.06	35.06
FL	375	---	---	0.00	1.34	---	---		1.34	1.34
FL	395	1.21	---	1.21	---	---	---		1.21	1.21
FL	595	4.20	---	4.20	8.80	---	---		13.00	13.00
FL	12 Routes	1,413.88	46.31	1,460.19	11.58	0.00	0.00		1,471.77	1,471.77

GA	16	165.41	---	165.41	---	---	---		165.41	165.41
GA	20	201.75	---	201.75	---	---	---		201.75	201.75
GA	24	4.12	---	4.12	---	---	---		4.12	4.12
GA	59	19.94	---	19.94	---	---	---		19.94	19.94
GA	75	355.00	---	355.00	---	---	---		355.00	355.00
GA	85	170.94	---	170.94	---	---	8.00	I-75	170.94	178.94
GA	95	111.69	---	111.69	---	---	---		111.69	111.69
GA	185	43.57	---	43.57	5.50	---	---		49.07	49.07
GA	285	61.63	---	61.63	---	---	1.21	I-85	61.63	62.84
GA	475	15.59	---	15.59	---	---	---		15.59	15.59
GA	516	---	---	0.00	6.40	---	---		6.40	6.40
GA	520	1.00	9.11	10.11	---	---	---		10.11	10.11
GA	575	1.70	29.16	30.86	---	---	---		30.86	30.86
GA	675	2.47	7.78	10.25	---	---	---		10.25	10.25
GA	985	---	---	0.00	24.40	---	---		24.40	24.40
GA	15 Routes	1,154.81	46.05	1,200.86	36.30	0.00	9.21		1,237.16	1,246.37

HI	H-1	26.90	---	26.90	---	---	---		26.90	26.90
HI	H-2	8.23	---	8.23	---	---	---		8.23	8.23
HI	H-3	16.09	---	16.09	---	---	---		16.09	16.09
HI	H-201	---	---	0.00	4.10	---	---		4.10	4.10
HI	4 Routes	51.22	0.00	51.22	4.10	0.00	0.00		55.32	55.32

ID	15	195.87	---	195.87	---	---	---		195.87	195.87
ID	84	275.36	---	275.36	---	---	---		275.36	275.36
ID	86	63.18	---	63.18	---	---	---		63.18	63.18
ID	90	73.73	---	73.73	---	---	---		73.73	73.73
ID	184	3.52	---	3.52	---	---	---		3.52	3.52
ID	5 Routes	611.66	0.00	611.66	0.00	0.00	0.00		611.66	611.66

IL	24	38.73	---	38.73	---	---	---		38.73	38.73
IL	39	---	---	0.00	119.59	---	---		119.59	119.59
IL	55	275.66	---	275.66	---	---	18.70	I-70	275.66	294.36
IL	57	352.98	---	352.98	---	---	5.59	I-70	352.98	358.57
IL	64	123.98	---	123.98	---	---	4.14	I-57	123.98	128.12
IL	70	160.25	---	160.25	---	---	---		160.25	160.25
IL	72	78.66	---	78.66	94.00	---	---		172.66	172.66
IL	74	214.29	---	214.29	---	---	5.89	I-55	214.29	220.18
IL	80	163.52	---	163.52	---	---	---		163.52	163.52
IL	88	---	---	0.00	140.59	---	---		140.59	140.59
IL	90	75.95	---	75.95	16.71	---	15.39	I-94	92.66	108.05
IL	94	74.89	---	74.89	---	---	2.48	I-80	74.89	77.37
IL	155	---	---	0.00	32.06	---	---		32.06	32.06
IL	172	---	---	0.00	19.00	---	---		19.00	19.00
IL	180	13.19	---	13.19	---	---	---		13.19	13.19
IL	190	---	---	0.00	3.07	---	---		3.07	3.07
IL	255	27.00	---	27.00	---	---	---		27.00	27.00
IL	270	14.97	---	14.97	---	---	---		14.97	14.97
IL	280	8.21	---	8.21	---	---	9.39	I-74	8.21	17.60
IL	290	29.84	---	29.84	---	---	---		29.84	29.84
IL	294	48.10	---	48.10	---	---	5.32	I-80	48.10	53.42
IL	355	---	---	0.00	20.01	---	---		20.01	20.01
IL	474	14.88	---	14.88	---	---	---		14.88	14.88
IL	23 Routes	1,715.10	0.00	1,715.10	445.03	0.00	66.90		2,160.13	2,227.03

IN	64	124.04	---	124.04	---	---	---		124.04	124.04
IN	65	262.08	---	262.08	---	---	---		262.08	262.08
IN	69	157.79	---	157.79	---	---	---		157.79	157.79
IN	70	154.14	---	154.14	---	---	2.13	I-65	154.14	156.27
IN	74	151.27	---	151.27	---	---	20.60	I-465	151.27	171.87
IN	80	151.65	---	151.65	---	---	---		151.65	151.65
IN	90	21.30	---	21.30	---	---	135.60	I-80	21.30	156.90
IN	94	29.68	---	29.68	---	---	16.05	I-80	29.68	45.73
IN	164	21.43	---	21.43	---	---	---		21.43	21.43
IN	265	6.73	---	6.73	---	---	---		6.73	6.73
IN	275	3.30	---	3.30	---	---	---		3.30	3.30
IN	465	53.14	---	53.14	5.03	---	---		58.17	58.17
IN	469	---	---	0.00	29.60	---	---		29.60	29.60
IN	13 Routes	1,136.55	0.00	1,136.55	34.63	0.00	174.38		1,171.18	1,345.56

IA	29	148.81	---	148.81	---	---	3.00	I-80	148.81	151.81
IA	35	218.47	---	218.47	---	---	---		218.47	218.47
IA	74	5.39	---	5.39	---	---	---		5.39	5.39
IA	80	292.28	---	292.28	---	---	14.29	!-35	292.28	306.57
IA	129	0.28	---	0.28	---	---	---		0.28	0.28
IA	235	13.85	---	13.85	---	---	---		13.85	13.85
IA	280	9.40	---	9.40	---	---	---		9.40	9.40
IA	380	73.12	---	73.12	---	---	---		73.12	73.12
IA	480	0.75	---	0.75	---	---	---		0.75	0.75
IA	680	19.71	---	19.71	---	---	9.91	I-29	19.71	29.62
IA	10 Routes	782.06	0.00	782.06	0.00	0.00	27.20		782.06	809.26

KS	35	235.52	---	235.52	---	---	---		235.52	235.52
KS	70	424.17	---	424.17	---	---	---		424.17	424.17
KS	135	95.74	---	95.74	---	---	---		95.74	95.74
KS	235	16.53	---	16.53	---	---	---		16.53	16.53
KS	335	---	---	0.00	50.10	---	---		50.10	50.10
KS	435	28.03	---	28.03	---	---	---		28.03	28.03
KS	470	11.45	---	11.45	---	---	---		11.45	11.45
KS	635	8.90	---	8.90	---	---	---		8.90	8.90
KS	670	0.84	---	0.84	---	---	---		0.84	0.84
KS	9 Routes	821.18	0.00	821.18	50.10	0.00	0.00		871.28	871.28

KY	24	93.37	---	93.37	---	---	---		93.37	93.37
KY	64	191.55	---	191.55	---	---	---		191.55	191.55
KY	65	137.60	---	137.60	---	---	---		137.60	137.60
KY	71	78.22	---	78.22	---	---	19.70	I-75	78.22	97.92
KY	75	184.70	---	184.70	---	---	6.90	I-64	184.70	191.60
KY	264	22.88	---	22.88	---	---	---		22.88	22.88
KY	265	3.28	---	3.28	21.20	---	---		24.48	24.48
KY	275	24.14	---	24.14	---	---	---		24.14	24.14
KY	471	4.80	---	4.80	---	---	---		4.80	4.80
KY	9 Routes	740.54	0.00	740.54	21.20	0.00	26.60		761.74	788.34

LA	10	274.42	---	274.42	---	---	---		274.42	274.42
LA	12	85.59	---	85.59	---	---	---		85.59	85.59
LA	20	189.87	---	189.87	---	---	---		189.87	189.87
LA	49	34.10	153.18	187.28	19.55	---	---		206.83	206.83
LA	55	65.81	---	65.81	---	---	---		65.81	65.81
LA	59	11.48	---	11.48	---	---	---		11.48	11.48
LA	110	8.89	---	8.89	---	---	---		8.89	8.89
LA	210	12.40	---	12.40	---	---	---		12.40	12.40
LA	220	17.60	---	17.60	---	---	---		17.60	17.60
LA	310	11.50	---	11.50	---	---	---		11.50	11.50
LA	510	3.16	---	3.16	---	---	---		3.16	3.16
LA	610	4.02	---	4.02	---	---	---		4.02	4.02
LA	12 Routes	718.84	153.18	872.02	19.55	0.00	0.00		891.57	891.57

ME	95	297.89	---	297.89	---	---	---		297.89	297.89
ME	195	1.55	---	1.55	---	---	---		1.55	1.55
ME	295	10.90	---	10.90	---	---	---		10.90	10.90
ME	395	4.74	---	4.74	---	---	---		4.74	4.74
ME	495	---	---	0.00	50.50	---	---		50.50	50.50

MD	68	---	---	0.00	80.30	---	---		80.30	80.30
MD	70	93.23	---	93.23	---	---	---		93.23	93.23
MD	81	11.99	---	11.99	---	---	---		11.99	11.99
MD	83	34.05	---	34.05	---	---	---		34.05	34.05
MD	95	108.48	---	108.48	---	---	---		108.48	108.48
MD	97	2.67	14.90	17.57	---	---	---		17.57	17.57
MD	195	1.33	2.20	3.53	1.40	---	---		4.93	4.93
MD	270	34.52	---	34.52	---	---	---		34.52	34.52
MD	295	0.78	---	0.78	---	---	---		0.78	0.78
MD	370	1.49	1.18	2.67	---	---	---		2.67	2.67
MD	395	0.72	---	0.72	---	---	---		0.72	0.72
MD	495	15.26	---	15.26	---	---	---		15.26	15.26
MD	595	0.80	19.31	20.11	---	---	---		20.11	20.11
MD	695	28.58	---	28.58	2.20	---	---		30.78	30.78
MD	795	4.05	---	4.05	5.47	---	---		9.52	9.52
MD	895	15.00	---	15.00	---	---	---		15.00	15.00
MD	16 Routes	352.95	37.59	390.54	89.37	0.00	0.00		479.91	479.91

MA	84	8.06	---	8.06	---	---	---		8.06	8.06
MA	90	134.70	---	134.70	2.90	---	---		137.60	137.60
MA	91	54.92	---	54.92	---	---	---		54.92	54.92
MA	93	31.90	---	31.90	14.10	---	---		46.00	46.00
MA	95	52.56	---	52.56	37.54	---	---		90.10	90.10
MA	190	19.10	---	19.10	---	---	---		19.10	19.10
MA	195	25.42	---	25.42	14.28	---	---		39.70	39.70
MA	290	19.76	---	19.76	---	---	---		19.76	19.76
MA	291	5.53	---	5.53	---	---	---		5.53	5.53
MA	295	4.05	---	4.05	---	---	---		4.05	4.05
MA	391	4.68	---	4.68	---	---	---		4.68	4.68
MA	395	---	---	0.00	12.29	---	---		12.29	12.29
MA	495	88.53	12.90	101.43	18.50	---	---		119.93	119.93
MA	13 Routes	449.21	12.90	462.11	99.61	0.00	0.00		561.72	561.72

MI	69	126.60	---	126.60	66.80	---	5.20	I-96	193.40	198.60
MI	75	395.70	---	395.70	---	---	---		395.70	395.70
MI	94	275.60	---	275.60	---	---	---		275.60	275.60
MI	96	192.70	---	192.70	---	---	---		192.70	192.70
MI	194	3.40	---	3.40	---	---	---		3.40	3.40
MI	196	80.60	---	80.60	---	---	---		80.60	80.60
MI	275	30.30	---	30.30	---	---	---		30.30	30.30
MI	296	3.40	---	3.40	---	---	---		3.40	3.40
MI	375	1.10	---	1.10	---	---	---		1.10	1.10
MI	475	16.80	---	16.80	---	---	---		16.80	16.80
MI	496	11.80	---	11.80	---	---	---		11.80	11.80
MI	675	7.80	---	7.80	---	---	---		7.80	7.80
MI	696	28.20	---	28.20	---	---	---		28.20	28.20
MI	13 Routes	1,174.00	0.00	1,174.00	66.80	0.00	5.20		1,240.80	1,246.00

MN	35	220.46	---	220.46	---	---	39.23	I-35E	220.46	259.69
MN	35E	39.23	---	39.23	---	---	---		39.23	39.23
MN	35W	41.78	---	41.78	---	---	---		41.78	41.78
MN	90	275.70	---	275.70	---	---	---		275.70	275.70
MN	94	259.22	---	259.22	---	---	0.27	I-35E	259.22	259.49
MN	394	10.03	---	10.03	---	---	---		10.03	10.03
MN	494	42.73	---	42.73	---	---	---		42.73	42.73
MN	535	1.57	---	1.57	---	---	---		1.57	1.57
MN	694	21.98	---	21.98	---	---	0.65	I-35E	21.98	22.63
MN	9 Routes	912.70	0.00	912.70	0.00	0.00	40.15		912.70	952.85

MS	10	77.10	---	77.10	---	---	---		77.10	77.10
MS	20	129.30	---	129.30	---	---	25.20	I-55/59	129.30	154.50
MS	55	289.70	---	289.70	---	---	---		289.70	289.70
MS	59	171.20	---	171.20	---	---	---		171.20	171.20
MS	110	4.30	---	4.30	---	---	---		4.30	4.30
MS	220	11.60	---	11.60	---	---	---		11.60	11.60
MS	6 Routes	683.20	0.00	683.20	0.00	0.00	25.20		683.20	708.40

MO	29	124.80	---	124.80	---	---	5.50	I-35/40	124.80	130.30
MO	35	113.80	---	113.80	---	---	1.00	I-70	113.80	114.80
MO	44	290.80	---	290.80	---	---	---		290.80	290.80
MO	55	208.40	---	208.40	---	---	1.00	I-44	208.40	209.40
MO	57	22.00	---	22.00	---	---	---		22.00	22.00
MO	64	---	---	0.00	14.70	---	---		14.70	14.70
MO	70	251.60	---	251.60	---	---	---		251.60	251.60
MO	155	10.60	---	10.60	---	---	---		10.60	10.60
MO	170	6.25	---	6.25	4.29	---	---		10.54	10.54
MO	229	14.60	---	14.60	---	---	---		14.60	14.60
MO	255	3.70	---	3.70	---	---	---		3.70	3.70
MO	270	35.60	---	35.60	---	---	---		35.60	35.60
MO	435	50.40	---	50.40	---	---	---		50.40	50.40
MO	470	16.50	---	16.50	---	---	---		16.50	16.50
MO	635	3.70	---	3.70	---	---	---		3.70	3.70
MO	670	0.60	---	0.60	---	---	---		0.60	0.60
MO	16 Routes	1,153.35	0.00	1,153.35	18.99	0.00	7.50		1,172.34	1,179.84

MT	15	395.09	---	395.09	---	---	---		395.09	395.09
MT	90	542.33	---	542.33	---	---	7.65	I-15	542.33	549.98
MT	94	247.91	---	247.91	---	---	---		247.91	247.91
MT	115	1.39	---	1.39	---	---	---		1.39	1.39
MT	315	0.82	---	0.82	---	---	---		0.82	0.82
MT	5 Routes	1,187.54	0.00	1,187.54	0.00	0.00	7.65		1,187.54	1,195.19

NE	76	2.48	---	2.48	---	---	---		2.48	2.48
NE	80	455.31	---	455.31	---	---	---		455.31	455.31
NE	129	3.21	---	3.21	---	---	---		3.21	3.21
NE	180	3.18	---	3.18	---	---	---		3.18	3.18
NE	480	4.04	---	4.04	---	---	---		4.04	4.04
NE	680	13.26	---	13.26	---	---	---		13.26	13.26
NE	6 Routes	481.48	0.00	481.48	0.00	0.00	0.00		481.48	481.48

NV	15	123.77	---	123.77	---	---	---		123.77	123.77
NV	80	410.67	---	410.67	---	---	---		410.67	410.67
NV	515	6.00	---	6.00	14.90	---	---		20.90	20.90
NV	580	3.00	---	3.00	1.21	---	---		4.21	4.21
NV	4 Routes	543.44	0.00	543.44	16.11	0.00	0.00		559.55	559.55

NH	89	60.93	---	60.93	---	---	---		60.93	60.93
NH	93	131.81	---	131.81	---	---	---		131.81	131.81
NH	95	16.13	---	16.13	---	---	---		16.13	16.13
NH	293	5.54	---	5.54	5.68	---	---		11.22	11.22
NH	393	4.60	---	4.60	---	---	---		4.60	4.60
NH	5 Routes	219.01	0.00	219.01	5.68	0.00	0.00		224.69	224.69

NJ	76	2.80	---	2.80	---	---	---		2.80	2.80
NJ	78	68.15	---	68.15	---	---	---		68.15	68.15
NJ	80	68.10	---	68.10	---	---	---		68.10	68.10
NJ	95	79.08	---	79.08	---	---	---		79.08	79.08
NJ	195	7.00	27.30	34.30	---	---	---		34.30	34.30
NJ	278	2.00	---	2.00	---	---	---		2.00	2.00
NJ	280	18.10	---	18.10	---	---	---		18.10	18.10
NJ	287	67.40	---	67.40	---	---	---		67.40	67.40
NJ	295	77.30	---	77.30	---	---	---		77.30	77.30
NJ	676	4.60	---	4.60	---	---	---		4.60	4.60
NJ	10 Routes	394.53	27.30	421.83	0.00	0.00	0.00		421.83	421.83

NM	10	164.28	---	164.28	---	---	---		164.28	164.28
NM	25	462.11	---	462.11	---	---	---		462.11	462.11
NM	40	373.51	---	373.51	---	---	---		373.51	373.51
NM	3 Routes	999.90	0.00	999.90	0.00	0.00	0.00		999.90	999.90

NY	78	0.50	---	0.50	---	---	---		0.50	0.50
NY	81	184.10	---	184.10	---	---	---		184.10	184.10
NY	84	71.60	---	71.60	---	---	---		71.60	71.60
NY	87	302.95	---	302.95	29.80	---	---		332.75	332.75
NY	88	117.77	---	117.77	---	---	---		117.77	117.77
NY	90	386.77	---	386.77	---	---	---		386.77	386.77
NY	95	23.25	---	23.25	---	---	---		23.25	23.25
NY	190	28.45	---	28.45	---	---	---		28.45	28.45
NY	278	33.25	---	33.25	---	---	---		33.25	33.25
NY	287	11.60	---	11.60	---	---	---		11.60	11.60
NY	290	9.96	---	9.96	---	---	---		9.96	9.96
NY	295	9.00	---	9.00	---	---	---		9.00	9.00
NY	390	14.40	60.50	74.90	---	---	---		74.90	74.90
NY	478	---	---	0.00	1.90	---	---		1.90	1.90
NY	481	14.99	---	14.99	---	---	---		14.99	14.99
NY	490	37.97	---	37.97	---	---	---		37.97	37.97
NY	495	3.60	---	3.60	62.70	---	---		66.30	66.30
NY	587	1.40	---	1.40	---	---	---		1.40	1.40
NY	590	---	5.10	5.10	---	---	---		5.10	5.10
NY	678	6.30	---	6.30	7.80	---	---		14.10	14.10
NY	684	26.60	---	26.60	---	---	---		26.60	26.60
NY	690	14.60	---	14.60	---	---	---		14.60	14.60
NY	787	10.50	---	10.50	---	---	---		10.50	10.50
NY	790	2.55	---	2.55	---	---	---		2.55	2.55
NY	878	0.70	---	0.70	---	---	---		0.70	0.70
NY	890	8.90	---	8.90	---	---	---		8.90	8.90
NY	895	1.10	---	1.10	---	---	---		1.10	1.10
NY	990	4.14	---	4.14	2.04	---	---		6.18	6.18
NY	28 Routes	1,326.95	65.60	1,392.55	104.24	0.00	0.00		1,496.79	1,496.79

NC	26	39.95	---	39.95	---	---	---		39.95	39.95
NC	40	288.49	---	288.49	91.40	---	38.98	I-40	379.89	418.87
NC	73	---	---	0.00	---	56.70	---		56.70	56.70
NC	77	99.47	---	99.47	5.80	---	---		105.27	105.27
NC	85	233.41	---	233.41	---	---	---		233.41	233.41
NC	95	181.39	---	181.39	---	---	---		181.39	181.39
NC	240	2.22	---	2.22	6.92	---	---		9.14	9.14
NC	277	2.69	---	2.69	1.72	---	---		4.41	4.41
NC	440	---	---	0.00	16.70	---	---		16.70	16.70
NC	540	---	---	0.00	5.00	---	---		5.00	5.00
NC	10 Routes	847.62	0.00	847.62	127.54	56.70	38.98		1,031.86	1,070.84

ND	29	217.50	---	217.50	---	---	---		217.50	217.50
ND	94	352.50	---	352.50	---	---	---		352.50	352.50
ND	194	1.19	---	1.19	---	---	---		1.19	1.19
ND	3 Routes	571.19	0.00	571.19	0.00	0.00	0.00		571.19	571.19

OH	70	225.69	---	225.69	---	---	---		225.69	225.69
OH	71	245.70	---	245.70	---	---	1.96	I-75/70	245.70	247.66
OH	74	19.45	---	19.45	---	---	---		19.45	19.45
OH	75	211.53	---	211.53	---	---	---		211.53	211.53
OH	76	77.82	---	77.82	---	---	---		77.82	77.82
OH	77	163.10	---	163.10	---	---	---		163.10	163.10
OH	80	202.07	---	202.07	35.00	---	---		237.07	237.07
OH	90	101.33	---	101.33	---	---	142.80	I-80	101.33	244.13
OH	270	55.08	---	55.08	---	---	---		55.08	55.08
OH	271	35.79	---	35.79	---	---	5.84	I-480	35.79	41.63
OH	275	52.09	---	52.09	---	---	3.45	I-74	52.09	55.54
OH	277	3.62	---	3.62	---	---	---		3.62	3.62
OH	280	12.43	---	12.43	---	---	---		12.43	12.43
OH	470	6.40	---	6.40	---	---	---		6.40	6.40
OH	471	0.54	---	0.54	---	---	---		0.54	0.54
OH	475	19.92	---	19.92	---	---	---		19.92	19.92
OH	480	42.88	---	42.88	---	---	---		42.88	42.88
OH	490	1.71	---	1.71	---	---	---		1.71	1.71
OH	670	10.68	---	10.68	---	---	---		10.68	10.68
OH	675	25.91	---	25.91	---	---	---		25.91	25.91
OH	680	16.65	---	16.65	---	---	---		16.65	16.65
OH	21 Routes	1,530.39	0.00	1,530.39	35.00	0.00	154.05		1,565.39	1,719.44

OK	35	235.96	---	235.96	---	---	---		235.96	235.96
OK	40	329.50	---	329.50	---	---	1.53	I-35	329.50	331.03
OK	44	209.40	---	209.40	114.76	---	4.37	I-35	324.16	328.53
OK	235	3.66	---	3.66	1.54	---	---		5.20	5.20
OK	240	11.87	---	11.87	4.35	---	---		16.22	16.22
OK	244	15.75	---	15.75	---	---	---		15.75	15.75
OK	444	2.51	---	2.51	---	---	---		2.51	2.51
OK	7 Routes	808.65	0.00	808.65	120.65	0.00	5.90		929.30	935.20

OR	5	308.41	---	308.41	---	---	---		308.41	308.41
OR	82	10.72	---	10.72	---	---	---		10.72	10.72
OR	84	368.34	---	368.34	6.89	---	---		375.23	375.23
OR	105	3.49	---	3.49	---	---	---		3.49	3.49
OR	205	26.07	---	26.07	---	---	---		26.07	26.07
OR	405	3.39	---	3.39	---	---	---		3.39	3.39
OR	6 Routes	720.42	0.00	720.42	6.89	0.00	0.00		727.31	727.31

PA	70	81.51	---	81.51	---	---	87.22	I-76	81.51	168.73
PA	76	351.25	---	351.25	---	---	---		351.25	351.25
PA	78	76.69	---	76.69	---	---	---		76.69	76.69
PA	79	180.18	---	180.18	---	---	3.55	I-70	180.18	183.73
PA	80	311.24	---	311.24	---	---	---		311.24	311.24
PA	81	233.70	---	233.70	---	---	---		233.70	233.70
PA	83	50.06	---	50.06	---	---	---		50.06	50.06
PA	84	49.75	---	49.75	---	---	---		49.75	49.75
PA	90	46.60	---	46.60	---	---	---		46.60	46.60
PA	95	50.85	---	50.85	---	---	---		50.85	50.85
PA	99	---	---	0.00	---	53.00	---		53.00	53.00
PA	176	11.27	---	11.27	---	---	---		11.27	11.27
PA	180	---	---	0.00	28.80	---	---		28.80	28.80
PA	276	29.38	---	29.38	---	---	---		29.38	29.38
PA	279	19.07	---	19.07	---	---	---		19.07	19.07
PA	283	3.07	---	3.07	---	---	---		3.07	3.07
PA	376	14.69	---	14.69	---	---	---		14.69	14.69
PA	380	28.30	---	28.30	---	---	---		28.30	28.30
PA	476	21.25	---	21.25	110.00	---	---		131.25	131.25
PA	579	1.30	---	1.30	---	---	---		1.30	1.30
PA	676	2.59	---	2.59	---	---	---		2.59	2.59
PA	21 Routes	1,562.75	0.00	1,562.75	138.80	53.00	90.77		1,754.55	1,845.32

RI	95	43.31	---	43.31	---	---	---		43.31	43.31
RI	195	4.17	---	4.17	---	---	---		4.17	4.17
RI	295	23.34	---	23.34	---	---	---		23.34	23.34
RI	3 Routes	70.82	0.00	70.82	0.00	0.00	0.00		70.82	70.82

SC	20	141.51	---	141.51	---	---	---		141.51	141.51
SC	26	220.95	---	220.95	---	---	---		220.95	220.95
SC	77	75.17	---	75.17	9.50	---	---		84.67	84.67
SC	85	106.28	---	106.28	---	---	---		106.28	106.28
SC	95	198.76	---	198.76	---	---	---		198.76	198.76
SC	126	3.68	---	3.68	---	---	---		3.68	3.68
SC	185	2.98	---	2.98	---	---	---		2.98	2.98
SC	326	5.24	---	5.24	---	---	---		5.24	5.24
SC	385	6.21	---	6.21	36.00	---	---		42.21	42.21
SC	526	8.98	---	8.98	11.20	---	---		20.18	20.18
SC	585	2.25	---	2.25	---	---	---		2.25	2.25
SC	11 Routes	772.01	0.00	772.01	56.70	0.00	0.00		828.71	828.71

SD	29	252.65	---	252.65	---	---	---		252.65	252.65
SD	90	412.84	---	412.84	---	---	---		412.84	412.84
SD	190	1.61	---	1.61	---	---	---		1.61	1.61
SD	229	11.63	---	11.63	---	---	---		11.63	11.63
SD	4 Routes	678.73	0.00	678.73	0.00	0.00	0.00		678.73	678.73

TN	24	175.00	---	175.00	---	---	5.30	I-40/65	175.00	180.30
TN	40	455.25	---	455.25	---	---	---		455.25	455.25
TN	55	12.20	---	12.20	---	---	---		12.20	12.20
TN	65	120.40	---	120.40	---	---	1.00	I-40	120.40	121.40
TN	75	142.00	---	142.00	---	---	19.60	I-40	142.00	161.60
TN	81	75.30	---	75.30	---	---	---		75.30	75.30
TN	124	1.90	---	1.90	---	---	---		1.90	1.90
TN	140	---	---	0.00	11.20	---	---		11.20	11.20
TN	155	16.10	---	16.10	---	---	---		16.10	16.10
TN	181	---	---	0.00	23.80	---	---		23.80	23.80
TN	240	19.00	---	19.00	---	---	---		19.00	19.00
TN	265	2.25	---	2.25	---	---	---		2.25	2.25
TN	275	2.90	---	2.90	---	---	---		2.90	2.90
TN	440	7.50	---	7.50	---	---	---		7.50	7.50
TN	640	7.10	---	7.10	---	---	---		7.10	7.10
TN	15 Routes	1,036.90	0.00	1,036.90	35.00	0.00	25.90		1,071.90	1,097.80

TX	10	878.21	---	878.21	---	---	2.39	I-35	878.21	880.60
TX	20	633.98	---	633.98	2.00	---	---		635.98	635.98
TX	27	111.48	---	111.48	12.90	---	---		124.38	124.38
TX	30	193.70	---	193.70	29.93	---	---		223.63	223.63
TX	35	406.88	---	406.88	---	---	96.95	I-35E	406.88	503.83
TX	35E	96.95	---	96.95	---	---	---		96.95	96.95
TX	35W	85.20	---	85.20	---	---	---		85.20	85.20
TX	37	143.06	---	143.06	---	---	---		143.06	143.06
TX	40	177.00	---	177.00	---	---	---		177.00	177.00
TX	44	---	---	0.00	14.70	---	---		14.70	14.70
TX	45	284.99	---	284.99	---	---	---		284.99	284.99
TX	110	0.94	---	0.94	---	---	---		0.94	0.94
TX	345	1.26	---	1.26	---	---	---		1.26	1.26
TX	410	39.23	---	39.23	9.93	---	---		49.16	49.16
TX	610	38.01	---	38.01	---	---	---		38.01	38.01
TX	635	36.94	---	36.94	---	---	---		36.94	36.94
TX	820	34.75	---	34.75	---	---	---		34.75	34.75
TX	17 Routes	3,162.58	0.00	3,162.58	69.46	0.00	99.34		3,232.04	3,331.38

UT	15	405.49	---	405.49	---	---	---		405.49	405.49
UT	70	230.77	---	230.77	---	---	---		230.77	230.77
UT	80	194.27	---	194.27	---	---	3.31	I-15	194.27	197.58
UT	84	81.20	---	81.20	---	---	35.98	I-15	81.20	117.18
UT	215	29.59	---	29.59	---	---	---		29.59	29.59
UT	5 Routes	941.32	0.00	941.32	0.00	0.00	39.29		941.32	980.61

VT	89	130.39	---	130.39	---	---	---		130.39	130.39
VT	91	177.62	---	177.62	---	---	---		177.62	177.62
VT	93	11.06	---	11.06	---	---	---		11.06	11.06
VT	189	1.37	---	1.37	---	---	---		1.37	1.37
VT	4 Routes	320.44	0.00	320.44	0.00	0.00	0.00		320.44	320.44

VA	64	268.52	---	268.52	---	---	30.40	I-81	268.52	298.92
VA	66	75.26	---	75.26	---	---	---		75.26	75.26
VA	77	58.60	---	58.60	---	---	8.80	I-81	58.60	67.40
VA	81	324.01	---	324.01	---	---	---		324.01	324.01
VA	85	68.52	---	68.52	---	---	---		68.52	68.52
VA	95	150.23	---	150.23	24.08	---	---		174.31	174.31
VA	195	3.20	---	3.20	---	---	---		3.20	3.20
VA	264	13.17	---	13.17	---	---	---		13.17	13.17
VA	295	52.86	---	52.86	---	---	---		52.86	52.86
VA	381	1.17	---	1.17	---	---	---		1.17	1.17
VA	395	9.59	---	9.59	---	---	---		9.59	9.59
VA	464	5.71	---	5.71	---	---	---		5.71	5.71
VA	495	14.39	---	14.39	---	---	---		14.39	14.39
VA	564	2.94	---	2.94	---	---	---		2.94	2.94
VA	581	6.40	---	6.40	---	---	---		6.40	6.40
VA	664	10.77	---	10.77	9.20	---	---		19.97	19.97
VA	16 Routes	1,065.34	0.00	1,065.34	33.28	0.00	39.20		1,098.62	1,137.82

WA	5	276.62	---	276.62	---	---	---		276.62	276.62
WA	82	132.26	---	132.26	---	---	---		132.26	132.26
WA	90	297.01	---	297.01	---	---	---		297.01	297.01
WA	182	15.20	---	15.20	---	---	---		15.20	15.20
WA	205	10.93	---	10.93	---	---	---		10.93	10.93
WA	405	30.33	---	30.33	---	---	---		30.33	30.33
WA	705	1.50	---	1.50	---	---	---		1.50	1.50
WA	7 Routes	763.85	0.00	763.85	0.00	0.00	0.00		763.85	763.85

WV	64	122.98	---	122.98	---	---	63.88	I-77	122.98	186.86
WV	68	---	---	0.00	31.80	---	---		31.80	31.80
WV	70	14.45	---	14.45	---	---	---		14.45	14.45
WV	77	187.21	---	187.21	---	---	---		187.21	187.21
WV	79	160.52	---	160.52	---	---	---		160.52	160.52
WV	81	26.00	---	26.00	---	---	---		26.00	26.00
WV	470	3.95	---	3.95	---	---	---		3.95	3.95
WV	7 Routes	515.11	0.00	515.11	31.80	0.00	63.88		546.91	610.79

WI	39	---	---	0.00	104.00	---	---		104.00	104.00
WI	43	119.58	---	119.58	63.00	---	---		182.58	182.58
WI	90	187.17	---	187.17	---	---	---		187.17	187.17
WI	94	256.35	---	256.35	---	---	---		256.35	256.35
WI	535	1.22	---	1.22	---	---	---		1.22	1.22
WI	794	3.75	---	3.75	---	---	---		3.75	3.75
WI	894	10.02	---	10.02	---	---	---		10.02	10.02
WI	7 Routes	578.09	0.00	578.09	167.00	0.00	0.00		745.09	745.09

WY	25	300.90	---	300.90	---	---	---		300.90	300.90
WY	80	402.86	---	402.86	---	---	---		402.86	402.86
WY	90	208.79	---	208.79	---	---	---		208.79	208.79
WY	180	1.06	---	1.06	---	---	---		1.06	1.06
WY	4 Routes	913.61	0.00	913.61	0.00	0.00	0.00		913.61	913.61
GRAND TOTALS		42,391.87	402.62	42,794.49	2,108.33	109.70	1,081.22		45,012.52	46,093.74
Footnote:	Overlap mileage is included in the Total Length of each overlap route. The Net Length mileages only include the overlap mileage once, as assigned by the State to the predominant route.

Miles of Interstate Routes by State
(States Sorted Alphabetically)
State	Number of Routes	"CHARGEABLE" MILES UNDER 23 USC 103(e)			"N0N-CHARGEABLE" MILEAGE		Mileage of Other Overlap Routes	TOTAL Length With Overlap Miles	NET Length Without Overlap Miles
State	Number of Routes	Original 42,500 Miles (e)(1),(3)	Howard-Cramer Additions (e)(2)	Subtotal 103(e)	Miles Added Title 23 139(a)	High Priority Rte Additions per NHS Act	Mileage of Other Overlap Routes	TOTAL Length With Overlap Miles	NET Length Without Overlap Miles
AL	10	905.20	0.00	905.20	0.00	0.00	130.10	1,035.30	905.20
AZ	6	1,167.45	0.00	1,167.45	0.00	0.00	0.00	1,167.45	1,167.45
AR	7	526.34	0.00	526.34	15.93	0.00	2.22	544.49	542.27
CA	25	2,304.51	7.00	2,311.51	141.80	0.00	1.60	2,454.91	2,453.31
CO	5	950.76	0.00	950.76	0.00	0.00	0.00	950.76	950.76
CT	8	284.35	6.69	291.04	54.69	0.00	0.00	345.73	345.73
DE	3	40.61	0.00	40.61	0.00	0.00	0.00	40.61	40.61
DC	5	13.65	0.00	13.65	0.00	0.00	0.00	13.65	13.65
FL	12	1,413.88	46.31	1,460.19	11.58	0.00	0.00	1,471.77	1,471.77
GA	15	1,154.81	46.05	1,200.86	36.30	0.00	9.21	1,246.37	1,237.16
HI	4	51.22	0.00	51.22	4.10	0.00	0.00	55.32	55.32
ID	5	611.66	0.00	611.66	0.00	0.00	0.00	611.66	611.66
IL	23	1,715.10	0.00	1,715.10	445.03	0.00	66.90	2,227.03	2,160.13
IN	13	1,136.55	0.00	1,136.55	34.63	0.00	174.38	1,345.56	1,171.18
IA	10	782.06	0.00	782.06	0.00	0.00	27.20	809.26	782.06
KS	9	821.18	0.00	821.18	50.10	0.00	0.00	871.28	871.28
KY	9	740.54	0.00	740.54	21.20	0.00	26.60	788.34	761.74
LA	12	718.84	153.18	872.02	19.55	0.00	0.00	891.57	891.57
ME	5	315.08	0.00	315.08	50.50	0.00	0.00	365.58	365.58
MD	16	352.95	37.59	390.54	89.37	0.00	0.00	479.91	479.91
MA	13	449.21	12.90	462.11	99.61	0.00	0.00	561.72	561.72
MI	13	1,174.00	0.00	1,174.00	66.80	0.00	5.20	1,246.00	1,240.80
MN	9	912.70	0.00	912.70	0.00	0.00	40.15	952.85	912.70
MS	6	683.20	0.00	683.20	0.00	0.00	25.20	708.40	683.20
MO	16	1,153.35	0.00	1,153.35	18.99	0.00	7.50	1,179.84	1,172.34
MT	5	1,187.54	0.00	1,187.54	0.00	0.00	7.65	1,195.19	1,187.54
NE	6	481.48	0.00	481.48	0.00	0.00	0.00	481.48	481.48
NV	4	543.44	0.00	543.44	16.11	0.00	0.00	559.55	559.55
NH	5	219.01	0.00	219.01	5.68	0.00	0.00	224.69	224.69
NJ	10	394.53	27.30	421.83	0.00	0.00	0.00	421.83	421.83
NM	3	999.90	0.00	999.90	0.00	0.00	0.00	999.90	999.90
NY	28	1,326.95	65.60	1,392.55	104.24	0.00	0.00	1,496.79	1,496.79
NC	10	847.62	0.00	847.62	127.54	56.70	38.98	1,070.84	1,031.86
ND	3	571.19	0.00	571.19	0.00	0.00	0.00	571.19	571.19
OH	21	1,530.39	0.00	1,530.39	35.00	0.00	154.05	1,719.44	1,565.39
OK	7	808.65	0.00	808.65	120.65	0.00	5.90	935.20	929.30
OR	6	720.42	0.00	720.42	6.89	0.00	0.00	727.31	727.31
PA	21	1,562.75	0.00	1,562.75	138.80	53.00	90.77	1,845.32	1,754.55
RI	3	70.82	0.00	70.82	0.00	0.00	0.00	70.82	70.82
SC	11	772.01	0.00	772.01	56.70	0.00	0.00	828.71	828.71
SD	4	678.73	0.00	678.73	0.00	0.00	0.00	678.73	678.73
TN	15	1,036.90	0.00	1,036.90	35.00	0.00	25.90	1,097.80	1,071.90
TX	17	3,162.58	0.00	3,162.58	69.46	0.00	99.34	3,331.38	3,232.04
UT	5	941.32	0.00	941.32	0.00	0.00	39.29	980.61	941.32
VT	4	320.44	0.00	320.44	0.00	0.00	0.00	320.44	320.44
VA	16	1,065.34	0.00	1,065.34	33.28	0.00	39.20	1,137.82	1,098.62
WA	7	763.85	0.00	763.85	0.00	0.00	0.00	763.85	763.85
WV	7	515.11	0.00	515.11	31.80	0.00	63.88	610.79	546.91
WI	7	578.09	0.00	578.09	167.00	0.00	0.00	745.09	745.09
WY	4	913.61	0.00	913.61	0.00	0.00	0.00	913.61	913.61
Grand Total		42,391.87	402.62	42,794.49	2,108.33	109.70	1,081.22	46,093.74	45,012.52

1- AND 2-DIGIT INTERSTATE ROUTES AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number	"CHARGEABLE" MILEAGE			"N0N-CHARGEABLE" MILEAGE		Mileage of Other Overlapping Routes	NET Length Without Overlap	TOTAL Length With Overlap
Interstate Route Number	Original 42,500 Miles 23 USC 103(e)(1),(3)	Howard-Cramer Additions 23 USC 103(e)(2)	Subtotal 103e(1),(2)(3)	Miles Added Under 23 USC 139(a)	High Priority Route Additions per NHS Act	Mileage of Other Overlapping Routes	NET Length Without Overlap	TOTAL Length With Overlap
I-4	132.06	---	132.06	---	---	---	132.06	132.06
I-5	1,382.04	---	1,382.04	---	---	---	1,382.04	1,382.04
I-8	348.32	---	348.32	---	---	---	348.32	348.32
I-10	2,455.97	---	2,455.97	---	---	3.99	2,455.97	2,459.96
I-12	85.59	---	85.59	---	---	---	85.59	85.59
I-15	1,436.89	---	1,436.89	---	---	---	1,436.89	1,436.89
I-16	165.41	---	165.41	---	---	---	165.41	165.41
I-17	145.24	---	145.24	---	---	---	145.24	145.24
I-19	63.35	---	63.35	---	---	---	63.35	63.35
I-20	1,381.01	---	1,381.01	2.00	---	155.30	1,383.01	1,538.31
I-24	311.22	---	311.22	---	---	5.30	311.22	316.52
I-25	1,061.95	---	1,061.95	---	---	---	1,061.95	1,061.95
I-26	260.90	---	260.90	---	---	---	260.90	260.90
I-27	111.48	---	111.48	12.90	---	---	124.38	124.38
I-29	743.76	---	743.76	---	---	8.50	743.76	752.26
I-30	336.78	---	336.78	29.93	---	---	366.71	366.71
I-35/E/W	1,694.25	---	1,694.25	---	---	137.18	1,694.25	1,831.43
I-37	143.06	---	143.06	---	---	---	143.06	143.06
I-39	---	---	0.00	223.59	---	---	223.59	223.59
I-40	2,422.38	---	2,422.38	91.40	---	40.51	2,513.78	2,554.29
I-43	119.58	---	119.58	63.00	---	---	182.58	182.58
I-44	500.20	---	500.20	129.46	---	4.37	629.66	634.03
I-45	284.99	---	284.99	---	---	---	284.99	284.99
I-49	34.10	153.18	187.28	19.55	---	---	206.83	206.83
I-55	921.77	---	921.77	---	---	21.92	921.77	943.69
I-57	374.98	---	374.98	---	---	5.59	374.98	380.57
I-59	444.02	---	444.02	---	---	---	444.02	444.02
I-64	831.07	---	831.07	14.70	---	98.42	845.77	944.19
I-65	887.08	---	887.08	---	---	1.00	887.08	888.08
I-66	76.37	---	76.37	---	---	---	76.37	76.37
I-68	---	---	0.00	112.10	---	---	112.10	112.10
I-69	284.39	---	284.39	66.80	---	5.20	351.19	356.39
I-70	2,086.11	---	2,086.11	---	---	89.35	2,086.11	2,175.46
I-71	323.92	---	323.92	---	---	21.66	323.92	345.58
I-72	78.66	---	78.66	94.00	---	---	172.66	172.66
I-73	---	---	0.00	---	56.70	---	56.70	56.70
I-74	390.40	---	390.40	---	---	26.49	390.40	416.89
I-75	1,714.68	46.31	1,760.99	---	---	26.50	1,760.99	1,787.49
I-76 (1)	431.87	---	431.87	---	---	---	431.87	431.87
I-76 (2)	186.62	---	186.62	---	---	---	186.62	186.62
I-77	583.55	---	583.55	15.30	---	8.80	598.85	607.65
I-78	145.34	---	145.34	---	---	---	145.34	145.34
I-79	340.70	---	340.70	---	---	3.55	340.70	344.25
I-80	2,854.17	---	2,854.17	35.00	---	17.60	2,889.17	2,906.77
I-81	855.10	---	855.10	---	---	---	855.10	855.10
I-82	142.98	---	142.98	---	---	---	142.98	142.98
I-83	84.11	---	84.11	---	---	---	84.11	84.11
I-84 (3)	724.90	---	724.90	6.89	---	35.98	731.79	767.77
I-84 (4)	227.93	---	227.93	---	---	---	227.93	227.93
I-85	659.15	---	659.15	---	---	8.00	659.15	667.15
I-86	63.18	---	63.18	---	---	---	63.18	63.18
I-87	302.95	---	302.95	29.80	---	---	332.75	332.75
I-88 IL	---	---	0.00	140.59	---	---	140.59	140.59
I-88 NY	117.77	---	117.77	---	---	---	117.77	117.77
I-89	191.32	---	191.32	---	---	---	191.32	191.32
I-90	2,764.22	---	2,764.22	19.61	---	301.44	2,783.83	3,085.27
I-91	290.52	---	290.52	---	---	---	290.52	290.52
I-93	174.77	---	174.77	14.10	---	---	188.87	188.87
I-94	1,496.15	---	1,496.15	---	---	18.80	1,496.15	1,514.95
I-95	1,831.14	---	1,831.14	61.62	---	---	1,892.76	1,892.76
I-96	192.70	---	192.70	---	---	---	192.70	192.70
I-97	2.67	14.90	17.57	---	---	---	17.57	17.57
I-99	---	---	0.00	---	53.00	---	53.00	53.00
H-1	26.90	---	26.90	---	---	---	26.90	26.90
H-2	8.23	---	8.23	---	---	---	8.23	8.23
H-3	16.09	---	16.09	---	---	---	16.09	16.09
Totals (5)	38,749.01	214.39	38,963.40	1,182.34	109.70	1,045.45	40,255.44	41,300.89
Footnotes: (1) = I-76 in NJ, OH & PA (2) = I-76 in CO & NE (3) = I-84 in ID, OR & UT (4) = I-84 in CT, MA, NY & PA (5) There are 66 1- and 2-digit routes, counting I-35/I-35E/I-35W as 1 route, and counting I-76, I84, and I-88 as 2 routes each. Overlap mileage is included in the TOTAL length of each overlap route. NET lengths only include the Overlap mileage once, as assigned to the predominant route.

INTERSTATE 3-DIGIT ROUTES AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number	State(s)	Mileage Designated Under 103(e)	Mileage Designated Under 139(a)	Mileage of Other Overlapping Routes	TOTAL Length With Overlap	NET Length Without Overlap
105	CA	17.30	---	---	17.30	17.30
105	OR	3.49	---	---	3.49	3.49
110	CA	20.50	---	---	20.50	20.50
110	FL	6.39	---	---	6.39	6.39
110	LA	8.89	---	---	8.89	8.89
110	MS	4.30	---	---	4.30	4.30
110	TX	0.94	---	---	0.94	0.94
115	MT	1.39	---	---	1.39	1.39
124	TN	1.90	---	---	1.90	1.90
126	SC	3.68	---	---	3.68	3.68
129	IA, NE	3.49	---	---	3.49	3.49
135	KS	95.74	---	---	95.74	95.74
140	TN	---	11.20	---	11.20	11.20
155	IL	---	32.06	---	32.06	32.06
155	MO, TN	26.70	---	---	26.70	26.70
164	IN	21.43	---	---	21.43	21.43
165	AL	4.90	---	---	4.90	4.90
170	MO	6.25	4.29	---	10.54	10.54
172	IL	---	19.00	---	19.00	19.00
175	FL	---	1.44	---	1.44	1.44
176	PA	11.27	---	---	11.27	11.27
180	IL	13.19	---	---	13.19	13.19
180	NE	3.18	---	---	3.18	3.18
180	PA	---	28.80	---	28.80	28.80
180	WY	1.06	---	---	1.06	1.06
181	TN	---	23.80	---	23.80	23.80
182	WA	15.20	---	---	15.20	15.20
184	ID	3.52	---	---	3.52	3.52
185	GA	43.57	5.50	---	49.07	49.07
185	SC	2.98	---	---	2.98	2.98
189	VT	1.37	---	---	1.37	1.37
190	IL	---	3.07	---	3.07	3.07
190	MA	19.10	---	---	19.10	19.10
190	NY	28.45	---	---	28.45	28.45
190	SD	1.61	---	---	1.61	1.61
194	MI	3.40	---	---	3.40	3.40
194	ND	1.19	---	---	1.19	1.19
195	FL	4.41	---	---	4.41	4.41
195	MD	3.53	1.40	---	4.93	4.93
195	ME	1.55	---	---	1.55	1.55
195	NJ	34.30	---	---	34.30	34.30
195	RI, MA	29.59	14.28	---	43.87	43.87
195	VA	3.20	---	---	3.20	3.20
196	MI	80.60	---	---	80.60	80.60
205	CA	13.00	---	---	13.00	13.00
205	OR, WA	37.00	---	---	37.00	37.00
210	CA	48.60	---	---	48.60	48.60
210	LA	12.40	---	---	12.40	12.40
215	CA	---	54.50	---	54.50	54.50
215	UT	29.59	---	---	29.59	29.59
220	LA	17.60	---	---	17.60	17.60
220	MS	11.60	---	---	11.60	11.60
225	CO	12.18	---	---	12.18	12.18
229	MO	14.60	---	---	14.60	14.60
229	SD	11.63	---	---	11.63	11.63
235	IA	13.85	---	---	13.85	13.85
235	KS	16.53	---	---	16.53	16.53
235	OK	3.66	1.54	---	5.20	5.20
238	CA	---	2.10	---	2.10	2.10
240	NC	2.22	6.92	---	9.14	9.14
240	OK	11.87	4.35	---	16.22	16.22
240	TN	19.00	---	---	19.00	19.00
244	OK	15.75	---	---	15.75	15.75
255	MO, IL	30.70	---	---	30.70	30.70
264	KY	22.88	---	---	22.88	22.88
264	VA	13.17	---	---	13.17	13.17
265	KY, IN	10.01	21.20	---	31.21	31.21
265	TN	2.25	---	---	2.25	2.25
270	CO	5.20	---	---	5.20	5.20
270	MD	34.52	---	---	34.52	34.52
270	MO, IL	50.57	---	---	50.57	50.57
270	OH	55.08	---	---	55.08	55.08
271	OH	35.79	---	5.84	41.63	35.79
275	FL	59.58	---	---	59.58	59.58
275	KY, OH, IN	79.53	---	3.45	82.98	79.53
275	MI	30.30	---	---	30.30	30.30
275	TN	2.90	---	---	2.90	2.90
276	PA	29.38	---	---	29.38	29.38
277	NC	2.69	1.72	---	4.41	4.41
277	OH	3.62	---	---	3.62	3.62
278	NJ, NY	35.25	---	---	35.25	35.25
279	PA	19.07	---	---	19.07	19.07
280	CA	57.10	---	---	57.10	57.10
280	IA, IL	17.61	---	9.39	27.00	17.61
280	NJ	18.10	---	---	18.10	18.10
280	OH	12.43	---	---	12.43	12.43
283	PA	3.07	---	---	3.07	3.07
285	GA	61.63	---	1.21	62.84	61.63
287	NJ, NY	79.00	---	---	79.00	79.00
290	IL	29.84	---	---	29.84	29.84
290	MA	19.76	---	---	19.76	19.76
290	NY	9.96	---	---	9.96	9.96
291	CT	5.88	---	---	5.88	5.88
291	MA	5.53	---	---	5.53	5.53
293	NH	5.54	5.68	---	11.22	11.22
294	IL	48.10	---	5.32	53.42	48.10
295	DC, MD	8.50	---	---	8.50	8.50
295	DE, NJ	83.01	---	---	83.01	83.01
295	FL	35.06	---	---	35.06	35.06
295	ME	10.90	---	---	10.90	10.90
295	NY	9.00	---	---	9.00	9.00
295	RI, MA	27.39	---	---	27.39	27.39
295	VA	52.86	---	---	52.86	52.86
296	MI	3.40	---	---	3.40	3.40
305	CA	5.30	---	---	5.30	5.30
310	LA	11.50	---	---	11.50	11.50
315	MT	0.82	---	---	0.82	0.82
326	SC	5.24	---	---	5.24	5.24
335	KS	---	50.10	---	50.10	50.10
345	TX	1.26	---	---	1.26	1.26
355	IL	---	20.01	---	20.01	20.01
359	AL	2.30	---	---	2.30	2.30
370	MD	2.67	---	---	2.67	2.67
375	FL	---	1.34	---	1.34	1.34
375	MI	1.10	---	---	1.10	1.10
376	PA	14.69	---	---	14.69	14.69
380	CA	3.30	---	---	3.30	3.30
380	IA	73.12	---	---	73.12	73.12
380	PA	28.30	---	---	28.30	28.30
381	VA	1.17	---	---	1.17	1.17
384	CT	7.40	---	---	7.40	7.40
385	SC	6.21	36.00	---	42.21	42.21
390	NY	74.90	---	---	74.90	74.90
391	MA	4.68	---	---	4.68	4.68
393	NH	4.60	---	---	4.60	4.60
394	MN	10.03	---	---	10.03	10.03
395	CT	---	54.69	---	54.69	54.69
395	FL	1.21	---	---	1.21	1.21
395	MA	---	12.29	---	12.29	12.29
395	MD	0.72	---	---	0.72	0.72
395	ME	4.74	---	---	4.74	4.74
395	VA, DC	13.08	---	---	13.08	13.08
405	CA	72.40	---	---	72.40	72.40
405	OR	3.39	---	---	3.39	3.39
405	WA	30.33	---	---	30.33	30.33
410	TX	39.23	9.93	---	49.16	49.16
430	AR	12.93	---	---	12.93	12.93
435	KS, MO	78.43	---	---	78.43	78.43
440	AR	---	9.96	---	9.96	9.96
440	NC	---	16.70	---	16.70	16.70
440	TN	7.50	---	---	7.50	7.50
444	OK	2.51	---	---	2.51	2.51
459	AL	32.80	---	---	32.80	32.80
464	VA	5.71	---	---	5.71	5.71
465	IN	53.14	5.03	---	58.17	58.17
469	IN	---	29.60	---	29.60	29.60
470	KS	11.45	---	---	11.45	11.45
470	MO	16.50	---	---	16.50	16.50
470	OH, WV	10.35	---	---	10.35	10.35
471	KY, OH	5.34	---	---	5.34	5.34
474	IL	14.88	---	---	14.88	14.88
475	GA	15.59	---	---	15.59	15.59
475	MI	16.80	---	---	16.80	16.80
475	OH	19.92	---	---	19.92	19.92
476	PA	21.25	110.00	---	131.25	131.25
478	NY	---	1.90	---	1.90	1.90
480	NE, IA	4.79	---	---	4.79	4.79
480	OH	42.88	---	---	42.88	42.88
481	NY	14.99	---	---	14.99	14.99
490	NY	37.97	---	---	37.97	37.97
490	OH	1.71	---	---	1.71	1.71
494	MN	42.73	---	---	42.73	42.73
495	DE	11.47	---	---	11.47	11.47
495	MA	101.43	18.50	---	119.93	119.93
495	ME	---	50.50	---	50.50	50.50
495	NY	3.60	62.70	---	66.30	66.30
495	VA, MD	29.65	---	---	29.65	29.65
496	MI	11.80	---	---	11.80	11.80
505	CA	32.90	---	---	32.90	32.90
510	LA	3.16	---	---	3.16	3.16
515	NV	6.00	14.90	---	20.90	20.90
516	GA	---	6.40	---	6.40	6.40
520	GA	10.11	---	---	10.11	10.11
526	SC	8.98	11.20	---	20.18	20.18
535	MN, WI	2.79	---	---	2.79	2.79
540	AR	8.13	5.97	---	14.10	14.10
540	NC	---	5.00	---	5.00	5.00
564	VA	2.94	---	---	2.94	2.94
565	AL	21.40	---	---	21.40	21.40
575	GA	30.86	---	---	30.86	30.86
579	PA	1.30	---	---	1.30	1.30
580	CA	68.40	7.30	---	75.70	75.70
580	NV	3.00	1.21	---	4.21	4.21
581	VA	6.40	---	---	6.40	6.40
585	SC	2.25	---	---	2.25	2.25
587	NY	1.40	---	---	1.40	1.40
590	NY	5.10	---	---	5.10	5.10
595	FL	4.20	8.80	---	13.00	13.00
595	MD	20.11	---	---	20.11	20.11
605	CA	27.40	---	---	27.40	27.40
610	LA	4.02	---	---	4.02	4.02
610	TX	38.01	---	---	38.01	38.01
630	AR	7.40	---	---	7.40	7.40
635	KS, MO	12.60	---	---	12.60	12.60
635	TX	36.94	---	---	36.94	36.94
640	TN	7.10	---	---	7.10	7.10
664	VA	10.77	9.20	---	19.97	19.97
670	KS, MO	1.44	---	---	1.44	1.44
670	OH	10.68	---	---	10.68	10.68
675	GA	10.25	---	---	10.25	10.25
675	MI	7.80	---	---	7.80	7.80
675	OH	25.91	---	---	25.91	25.91
676	PA, NJ	7.19	---	---	7.19	7.19
678	NY	6.30	7.80	---	14.10	14.10
680	CA	58.00	12.50	---	70.50	70.50
680	NE, IA	32.97	---	9.91	42.88	32.97
680	OH	16.65	---	---	16.65	16.65
684	NY, CT	28.00	---	---	28.00	28.00
690	NY	14.60	---	---	14.60	14.60
691	CT	8.29	---	---	8.29	8.29
694	MN	21.98	---	0.65	22.63	21.98
695	DC	1.21	---	---	1.21	1.21
695	MD	28.58	2.20	---	30.78	30.78
696	MI	28.20	---	---	28.20	28.20
705	WA	1.50	---	---	1.50	1.50
710	CA	---	19.70	---	19.70	19.70
759	AL	4.50	---	---	4.50	4.50
780	CA	6.50	---	---	6.50	6.50
787	NY	10.50	---	---	10.50	10.50
790	NY	2.55	---	---	2.55	2.55
794	WI	3.75	---	---	3.75	3.75
795	MD	4.05	5.47	---	9.52	9.52
805	CA	28.00	---	---	28.00	28.00
820	TX	34.75	---	---	34.75	34.75
878	NY	0.70	---	---	0.70	0.70
880	CA	---	44.70	---	44.70	44.70
890	NY	8.90	---	---	8.90	8.90
894	WI	10.02	---	---	10.02	10.02
895	MD	15.00	---	---	15.00	15.00
895	NY	1.10	---	---	1.10	1.10
980	CA	0.80	1.00	---	1.80	1.80
985	GA	---	24.40	---	24.40	24.40
990	NY	4.14	2.04	---	6.18	6.18
H-201	HI	---	4.10	---	4.10	4.10
Totals	234 Routes	3,831.09	925.99	35.77	4,792.85	4,757.08
Footnotes: - 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code. - 139(a) refers to routes designated under Section 139(a) of Title 23 U.S.C. Code. - Overlap mileage is included in the Total Length of each overlap route. - NET Mileages only include the overlap mileage once, as assigned by the State to the predominant route.

INTERSTATE LOOPS AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number	State(s)	Mileage Designated Under 103(e)	Mileage Designated Under 139(a)	Mileage of Other Overlapping Routes	TOTAL Length With Overlap	NET Length Without Overlap
205	CA	13.00	---	---	13.00	13.00
205	OR, WA	37.00	---	---	37.00	37.00
210	CA	48.60	---	---	48.60	48.60
210	LA	12.40	---	---	12.40	12.40
215	CA	---	54.50	---	54.50	54.50
215	UT	29.59	---	---	29.59	29.59
220	LA	17.60	---	---	17.60	17.60
220	MS	11.60	---	---	11.60	11.60
225	CO	12.18	---	---	12.18	12.18
229	MO	14.60	---	---	14.60	14.60
229	SD	11.63	---	---	11.63	11.63
235	IA	13.85	---	---	13.85	13.85
235	KS	16.53	---	---	16.53	16.53
235	OK	3.66	1.54	---	5.20	5.20
238	CA	---	2.10	---	2.10	2.10
240	NC	2.22	6.92	---	9.14	9.14
240	OK	11.87	4.35	---	16.22	16.22
240	TN	19.00	---	---	19.00	19.00
244	OK	15.75	---	---	15.75	15.75
255	MO, IL	30.70	---	---	30.70	30.70
264	KY	22.88	---	---	22.88	22.88
264	VA	13.17	---	---	13.17	13.17
265	KY, IN	10.01	21.20	---	31.21	31.21
265	TN	2.25	---	---	2.25	2.25
270	CO	5.20	---	---	5.20	5.20
270	MD	34.52	---	---	34.52	34.52
270	MO, IL	50.57	---	---	50.57	50.57
270	OH	55.08	---	---	55.08	55.08
271	OH	35.79	---	5.84	41.63	35.79
275	FL	59.58	---	---	59.58	59.58
275	KY, OH, IN	79.53	---	3.45	82.98	79.53
275	MI	30.30	---	---	30.30	30.30
275	TN	2.90	---	---	2.90	2.90
276	PA	29.38	---	---	29.38	29.38
277	NC	2.69	1.72	---	4.41	4.41
277	OH	3.62	---	---	3.62	3.62
278	NJ, NY	35.25	---	---	35.25	35.25
279	PA	19.07	---	---	19.07	19.07
280	CA	57.10	---	---	57.10	57.10
280	IA, IL	17.61	---	9.39	27.00	17.61
280	NJ	18.10	---	---	18.10	18.10
280	OH	12.43	---	---	12.43	12.43
283	PA	3.07	---	---	3.07	3.07
285	GA	61.63	---	1.21	62.84	61.63
287	NJ, NY	79.00	---	---	79.00	79.00
290	IL	29.84	---	---	29.84	29.84
290	MA	19.76	---	---	19.76	19.76
290	NY	9.96	---	---	9.96	9.96
291	CT	5.88	---	---	5.88	5.88
291	MA	5.53	---	---	5.53	5.53
293	NH	5.54	5.68	---	11.22	11.22
294	IL	48.10	---	5.32	53.42	48.10
295	DC, MD	8.50	---	---	8.50	8.50
295	DE, NJ	83.01	---	---	83.01	83.01
295	FL	35.06	---	---	35.06	35.06
295	ME	10.90	---	---	10.90	10.90
295	NY	9.00	---	---	9.00	9.00
295	RI, MA	27.39	---	---	27.39	27.39
295	VA	52.86	---	---	52.86	52.86
296	MI	3.40	---	---	3.40	3.40
405	CA	72.40	---	---	72.40	72.40
405	OR	3.39	---	---	3.39	3.39
405	WA	30.33	---	---	30.33	30.33
410	TX	39.23	9.93	---	49.16	49.16
430	AR	12.93	---	---	12.93	12.93
435	KS, MO	78.43	---	---	78.43	78.43
440	AR	---	9.96	---	9.96	9.96
440	NC	---	16.70	---	16.70	16.70
440	TN	7.50	---	---	7.50	7.50
444	OK	2.51	---	---	2.51	2.51
459	AL	32.80	---	---	32.80	32.80
464	VA	5.71	---	---	5.71	5.71
465	IN	53.14	5.03	---	58.17	58.17
469	IN	---	29.60	---	29.60	29.60
470	KS	11.45	---	---	11.45	11.45
470	MO	16.50	---	---	16.50	16.50
470	OH, WV	10.35	---	---	10.35	10.35
471	KY, OH	5.34	---	---	5.34	5.34
474	IL	14.88	---	---	14.88	14.88
475	GA	15.59	---	---	15.59	15.59
475	MI	16.80	---	---	16.80	16.80
475	OH	19.92	---	---	19.92	19.92
476	PA	21.25	110.00	---	131.25	131.25
478	NY	---	1.90	---	1.90	1.90
480	NE, IA	4.79	---	---	4.79	4.79
480	OH	42.88	---	---	42.88	42.88
481	NY	14.99	---	---	14.99	14.99
490	NY	37.97	---	---	37.97	37.97
490	OH	1.71	---	---	1.71	1.71
494	MN	42.73	---	---	42.73	42.73
495	DE	11.47	---	---	11.47	11.47
495	MA	101.43	18.50	---	119.93	119.93
495	ME	---	50.50	---	50.50	50.50
495	NY	3.60	62.70	---	66.30	66.30
495	VA, MD	29.65	---	---	29.65	29.65
496	MI	11.80	---	---	11.80	11.80
605	CA	27.40	---	---	27.40	27.40
610	LA	4.02	---	---	4.02	4.02
610	TX	38.01	---	---	38.01	38.01
630	AR	7.40	---	---	7.40	7.40
635	KS, MO	12.60	---	---	12.60	12.60
635	TX	36.94	---	---	36.94	36.94
640	TN	7.10	---	---	7.10	7.10
664	VA	10.77	9.20	---	19.97	19.97
670	KS, MO	1.44	---	---	1.44	1.44
670	OH	10.68	---	---	10.68	10.68
675	GA	10.25	---	---	10.25	10.25
675	MI	7.80	---	---	7.80	7.80
675	OH	25.91	---	---	25.91	25.91
676	PA, NJ	7.19	---	---	7.19	7.19
678	NY	6.30	7.80	---	14.10	14.10
680	CA	58.00	12.50	---	70.50	70.50
680	NE, IA	32.97	---	9.91	42.88	32.97
680	OH	16.65	---	---	16.65	16.65
684	NY, CT	28.00	---	---	28.00	28.00
690	NY	14.60	---	---	14.60	14.60
691	CT	8.29	---	---	8.29	8.29
694	MN	21.98	---	0.65	22.63	21.98
695	DC	1.21	---	---	1.21	1.21
695	MD	28.58	2.20	---	30.78	30.78
696	MI	28.20	---	---	28.20	28.20
805	CA	28.00	---	---	28.00	28.00
820	TX	34.75	---	---	34.75	34.75
878	NY	0.70	---	---	0.70	0.70
880	CA	---	44.70	---	44.70	44.70
890	NY	8.90	---	---	8.90	8.90
894	WI	10.02	---	---	10.02	10.02
895	MD	15.00	---	---	15.00	15.00
895	NY	1.10	---	---	1.10	1.10
H-201	HI	---	4.10	---	4.10	4.10
Totals	130 Loops	2,741.47	493.33	35.77	3,270.57	3,234.80
Footnotes: - 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code. - 139(a) refers to routes designated under Section 139(a) of Title 23 U.S.C. Code. - Overlap mileage is included in the Total Length of each overlap route. - NET Mileages only include the overlap mileage once, as assigned by the State to the predominant route.

INTERSTATE SPURS AND THEIR LENGTHS (IN MILES)
(As of 12/31/97)
Interstate Route Number	State(s)	Mileage Designated Under 103(e)	Mileage Designated Under 139(a)	Mileage of Other Overlapping Routes	TOTAL Length With Overlap	NET Length Without Overlap
105	CA	17.30	---	---	17.30	17.30
105	OR	3.49	---	---	3.49	3.49
110	CA	20.50	---	---	20.50	20.50
110	FL	6.39	---	---	6.39	6.39
110	LA	8.89	---	---	8.89	8.89
110	MS	4.30	---	---	4.30	4.30
110	TX	0.94	---	---	0.94	0.94
115	MT	1.39	---	---	1.39	1.39
124	TN	1.90	---	---	1.90	1.90
126	SC	3.68	---	---	3.68	3.68
129	IA, NE	3.49	---	---	3.49	3.49
135	KS	95.74	---	---	95.74	95.74
140	TN	---	11.20	---	11.20	11.20
155	IL	---	32.06	---	32.06	32.06
155	MO, TN	26.70	---	---	26.70	26.70
164	IN	21.43	---	---	21.43	21.43
165	AL	4.90	---	---	4.90	4.90
170	MO	6.25	4.29	---	10.54	10.54
172	IL	---	19.00	---	19.00	19.00
175	FL	---	1.44	---	1.44	1.44
176	PA	11.27	---	---	11.27	11.27
180	IL	13.19	---	---	13.19	13.19
180	NE	3.18	---	---	3.18	3.18
180	PA	---	28.80	---	28.80	28.80
180	WY	1.06	---	---	1.06	1.06
181	TN	---	23.80	---	23.80	23.80
182	WA	15.20	---	---	15.20	15.20
184	ID	3.52	---	---	3.52	3.52
185	GA	43.57	5.50	---	49.07	49.07
185	SC	2.98	---	---	2.98	2.98
189	VT	1.37	---	---	1.37	1.37
190	IL	---	3.07	---	3.07	3.07
190	MA	19.10	---	---	19.10	19.10
190	NY	28.45	---	---	28.45	28.45
190	SD	1.61	---	---	1.61	1.61
194	MI	3.40	---	---	3.40	3.40
194	ND	1.19	---	---	1.19	1.19
195	FL	4.41	---	---	4.41	4.41
195	MD	3.53	1.40	---	4.93	4.93
195	ME	1.55	---	---	1.55	1.55
195	NJ	34.30	---	---	34.30	34.30
195	RI, MA	29.59	14.28	---	43.87	43.87
195	VA	3.20	---	---	3.20	3.20
196	MI	80.60	---	---	80.60	80.60
305	CA	5.30	---	---	5.30	5.30
310	LA	11.50	---	---	11.50	11.50
315	MT	0.82	---	---	0.82	0.82
326	SC	5.24	---	---	5.24	5.24
335	KS	---	50.10	---	50.10	50.10
345	TX	1.26	---	---	1.26	1.26
355	IL	---	20.01	---	20.01	20.01
359	AL	2.30	---	---	2.30	2.30
370	MD	2.67	---	---	2.67	2.67
375	FL	---	1.34	---	1.34	1.34
375	MI	1.10	---	---	1.10	1.10
376	PA	14.69	---	---	14.69	14.69
380	CA	3.30	---	---	3.30	3.30
380	IA	73.12	---	---	73.12	73.12
380	PA	28.30	---	---	28.30	28.30
381	VA	1.17	---	---	1.17	1.17
384	CT	7.40	---	---	7.40	7.40
385	SC	6.21	36.00	---	42.21	42.21
390	NY	74.90	---	---	74.90	74.90
391	MA	4.68	---	---	4.68	4.68
393	NH	4.60	---	---	4.60	4.60
394	MN	10.03	---	---	10.03	10.03
395	CT	---	54.69	---	54.69	54.69
395	FL	1.21	---	---	1.21	1.21
395	MA	---	12.29	---	12.29	12.29
395	MD	0.72	---	---	0.72	0.72
395	ME	4.74	---	---	4.74	4.74
395	VA, DC	13.08	---	---	13.08	13.08
505	CA	32.90	---	---	32.90	32.90
510	LA	3.16	---	---	3.16	3.16
515	NV	6.00	14.90	---	20.90	20.90
516	GA	---	6.40	---	6.40	6.40
520	GA	10.11	---	---	10.11	10.11
526	SC	8.98	11.20	---	20.18	20.18
535	MN, WI	2.79	---	---	2.79	2.79
540	AR	8.13	5.97	---	14.10	14.10
540	NC	---	5.00	---	5.00	5.00
564	VA	2.94	---	---	2.94	2.94
565	AL	21.40	---	---	21.40	21.40
575	GA	30.86	---	---	30.86	30.86
579	PA	1.30	---	---	1.30	1.30
580	CA	68.40	7.30	---	75.70	75.70
580	NV	3.00	1.21	---	4.21	4.21
581	VA	6.40	---	---	6.40	6.40
585	SC	2.25	---	---	2.25	2.25
587	NY	1.40	---	---	1.40	1.40
590	NY	5.10	---	---	5.10	5.10
595	FL	4.20	8.80	---	13.00	13.00
595	MD	20.11	---	---	20.11	20.11
705	WA	1.50	---	---	1.50	1.50
710	CA	---	19.70	---	19.70	19.70
759	AL	4.50	---	---	4.50	4.50
780	CA	6.50	---	---	6.50	6.50
787	NY	10.50	---	---	10.50	10.50
790	NY	2.55	---	---	2.55	2.55
794	WI	3.75	---	---	3.75	3.75
795	MD	4.05	5.47	---	9.52	9.52
980	CA	0.80	1.00	---	1.80	1.80
985	GA	---	24.40	---	24.40	24.40
990	NY	4.14	2.04	---	6.18	6.18
Totals	104 Spurs	1,089.62	432.66	0.00	1,522.28	1,522.28
Footnotes: - 103(e) refers to routes designated under Sections 103(e)(1), (2) & (3) of Title 23 U.S.C. Code. - 139(a) refers to routes designated under 23 U.S.C. 139(a). - There are no other Interstate routes which overlap Interstate spur routes.

Interstate System Mileage By Urbanized Area
1	New York - Northeastern New Jersey	460
2	Chicago - Northwestern Indiana	422
3	Los Angeles	373
4	Dallas - Fort Worth	286
5	St. Louis	245
6	Atlanta	238
7	Detroit	203
8	San Francisco - Oakland	202
9	Kansas City	201
10	Minneapolis - St. Paul	194
11	Philadelphia	190
12	Cleveland	176
13	Washington, DC (MD, VA)	170
14	Pittsburgh	166
Note: Urbanized areas with at least 150 centerline miles on the Dwight D. Eisenhower System of Interstate and Defense Highways
Source: FHWA's 1996 Highway Statistics Table HM-71, pages V-80 thru V-85.

Highway History

The Dwight D. Eisenhower System of Interstate and Defense Highways

Part II - Mileage

Summary

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