Office of Highway Policy Information - Policy | Federal Highway Administration

Highway Statistics 2008

Federal - Aid Highway Length - 2008 1/ Miles by Traffic Lanes and Access Control National Summary

October 2009
Table HM-36

TRAFFIC LANES AND ACCESS CONTROL	NATIONAL HIGHWAY SYSTEM						OTHER FEDERAL - AID HIGHWAYS 2/		ALL FEDERAL-AID HIGHWAYS 2/
	INTERSTATE		OTHER		TOTAL		OTHER FEDERAL - AID HIGHWAYS 2/		ALL FEDERAL-AID HIGHWAYS 2/
	MILES	PERCENT	MILES	PERCENT	MILES	PERCENT	MILES	PERCENT	MILES	PERCENT
Rural:
One-way streets	-	0.0	10	0.0	10	0.0	346	0.1	356	0.1
2 lanes	943	3.1	53,613	65.6	54,556	48.7	553,574	98.0	608,130	89.8
3 lanes	65	0.2	1,765	2.2	1,830	1.6	1,251	0.2	3,081	0.5
4 or more lanes - undivided 3/	8	0.0	3,420	4.2	3,428	3.1	4,172	0.7	7,600	1.1
Divided highways - 4 or more lanes: 3/
Degree of access control:
None	1	0.0	11,352	13.9	11,353	10.1	4,551	0.8	15,904	2.3
Partial	12	0.0	7,492	9.2	7,504	6.7	1,117	0.2	8,621	1.3
Full	29,104	96.6	4,131	5.1	33,235	29.7	126	0.0	33,361	4.9
Total Rural	30,133	100.0	81,783	100.0	111,916	100.0	565,137	100.0	677,053	100.0
Small urban area:
One-way streets	-	0.0	124	1.6	124	1.3	627	1.1	751	1.1
2 lanes	-	0.0	2,180	28.7	2,180	22.0	46,967	84.2	49,147	74.8
3 lanes	-	0.0	121	1.6	121	1.2	512	0.9	633	1.0
4 or more lanes - undivided 3/	-	0.0	1,595	21.0	1,595	16.1	5,082	9.1	6,677	10.2
Divided highways - 4 or more lanes: 3/
Degree of access control:
None	-	0.0	1,503	19.8	1,503	15.2	1,905	3.4	3,408	5.2
Partial	-	0.0	1,218	16.0	1,218	12.3	586	1.1	1,804	2.7
Full	2,311	100.0	849	11.2	3,160	31.9	85	0.2	3,245	4.9
Total Small Urban Area	2,311	100.0	7,590	100.0	9,901	100.0	55,764	100.0	65,665	100.0
Urbanized Area:
One-way streets	6	0.0	511	1.9	517	1.2	6,750	3.3	7,267	2.9
2 lanes	11	0.1	3,872	14.3	3,883	9.4	142,723	69.3	146,606	59.2
3 lanes	7	0.0	156	0.6	163	0.4	1,903	0.9	2,066	0.8
4 or more lanes - undivided 3/	5	0.0	4,737	17.5	4,742	11.4	30,116	14.6	34,858	14.1
Divided highways - 4 or more lanes: 3/
Degree of access control:
None	16	0.1	6,170	22.7	6,186	14.9	20,240	9.8	26,426	10.7
Partial	90	0.6	4,294	15.8	4,384	10.6	3,521	1.7	7,905	3.2
Full	14,206	99.1	7,384	27.2	21,590	52.1	785	0.4	22,375	9.0
Total Urbanized Area	14,341	100.0	27,124	100.0	41,465	100.0	206,038	100.0	247,503	100.0
Total Urban:
One-way streets	6	0.0	635	1.8	641	1.2	7,377	2.8	8,018	2.6
2 lanes	11	0.1	6,052	17.4	6,063	11.8	189,690	72.5	195,753	62.5
3 lanes	7	0.0	277	0.8	284	0.6	2,415	0.9	2,699	0.9
4 or more lanes - undivided 3/	5	0.0	6,332	18.2	6,337	12.3	35,198	13.4	41,535	13.3
Divided highways - 4 or more lanes: 3/
Degree of access control:
None	16	0.1	7,673	22.1	7,689	15.0	22,145	8.5	29,834	9.5
Partial	90	0.5	5,512	15.9	5,602	10.9	4,107	1.6	9,709	3.1
Full	16,517	99.2	8,233	23.7	24,750	48.2	870	0.3	25,620	8.2
Total Urban	16,652	100.0	34,714	100.0	51,366	100.0	261,802	100.0	313,168	100.0
Total Rural and Urban	46,785		116,497		163,282		826,939		990,221

1/ Includes the 50 States, the District of Columbia, and Puerto Rico. Indiana excludes up to 788 miles of Federal agency roads.

2/ Some differences from other tables may be noted because these are estimated from sample data and do not include samples entirely on structures.

3/ Differences may exist from prior years due to the redefinition of divided and undivided roadways in 1999.