Office of Highway Policy Information - Policy | Federal Highway Administration

October 2009
Sheet 1 OF 2
Table HM-42

STATE	VOLUME-SERVICE FLOW RATIO (V/SF)
	INTERSTATE SYSTEM							OTHER							TOTAL
	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL
Alabama	-	138	298	33	45	25	539	572	1,156	234	7	1	44	2,014	572	1,294	532	40	46	69	2,553
Alaska	635	250	106	4	15	3	1,013	811	167	3	-	-	-	981	1,446	417	109	4	15	3	1,994
Arizona	116	617	227	9	11	1	981	535	454	104	5	-	17	1,115	651	1,071	331	14	11	18	2,096
Arkansas	1	137	261	11	30	9	449	838	657	225	25	34	35	1,814	839	794	486	36	64	44	2,263
California	14	357	444	263	150	53	1,281	641	1,293	1,065	123	146	101	3,369	655	1,650	1,509	386	296	154	4,650
Colorado	298	218	118	25	23	-	682	682	642	372	63	38	55	1,852	980	860	490	88	61	55	2,534
Connecticut	-	10	18	10	5	-	43	16	62	64	2	11	3	158	16	72	82	12	16	3	201
Delaware	-	-	-	-	-	-	-	6	78	69	10	3	5	171	6	78	69	10	3	5	171
Dist. of Columbia	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Florida	-	294	376	72	6	1	749	455	793	151	39	35	4	1,477	455	1,087	527	111	41	5	2,226
Georgia	23	162	410	101	20	1	717	2,239	689	176	35	-	18	3,157	2,262	851	586	136	20	19	3,874
Hawaii	-	-	-	6	-	-	6	-	55	35	7	5	-	102	-	55	35	13	5	-	108
Idaho	244	278	-	-	-	-	522	1,038	520	57	17	6	9	1,647	1,282	798	57	17	6	9	2,169
Illinois	593	656	89	-	-	16	1,354	1,371	270	-	-	-	-	1,641	1,964	926	89	-	-	16	2,995
Indiana 2/	95	488	101	10	12	-	706	450	646	114	1	-	-	1,211	545	1,134	215	11	12	-	1,917
Iowa	19	333	263	10	3	-	628	1,221	787	41	-	-	-	2,049	1,240	1,120	304	10	3	-	2,677
Kansas	330	289	24	-	-	-	643	1,737	782	61	-	-	-	2,580	2,067	1,071	85	-	-	-	3,223
Kentucky	13	211	309	16	4	-	553	626	728	258	40	63	14	1,729	639	939	567	56	67	14	2,282
Louisiana	21	198	239	16	2	-	476	314	606	114	11	1	-	1,046	335	804	353	27	3	-	1,522
Maine	138	116	39	6	-	-	299	192	425	172	1	-	4	794	330	541	211	7	-	4	1,093
Maryland	30	38	51	20	30	15	184	107	118	196	7	13	19	460	137	156	247	27	43	34	644
Massachusetts	7	25	32	9	13	5	91	46	51	52	-	17	-	166	53	76	84	9	30	5	257
Michigan	453	-	-	-	-	155	608	2,015	-	-	-	-	119	2,134	2,468	-	-	-	-	274	2,742
Minnesota	236	131	199	14	28	14	622	684	1,249	548	41	2	-	2,524	920	1,380	747	55	30	14	3,146
Mississippi	27	321	96	16	24	6	490	971	435	268	-	10	4	1,688	998	756	364	16	34	10	2,178
Missouri	137	210	374	-	1	-	722	577	1,252	487	22	33	50	2,421	714	1,462	861	22	34	50	3,143
Montana	969	161	-	-	-	-	1,130	2,056	500	56	5	-	-	2,617	3,025	661	56	5	-	-	3,747
Nebraska	103	263	54	-	-	-	420	1,896	404	9	-	-	-	2,309	1,999	667	63	-	-	-	2,729
Nevada	345	42	30	-	5	21	443	1,077	223	76	8	1	34	1,419	1,422	265	106	8	6	55	1,862
New Hampshire	34	75	32	4	3	-	148	44	158	187	12	2	4	407	78	233	219	16	5	4	555
New Jersey	-	6	25	10	8	16	65	20	79	98	12	33	13	255	20	85	123	22	41	29	320
New Mexico	329	424	90	-	-	1	844	1,054	509	120	-	-	26	1,709	1,383	933	210	-	-	27	2,553
New York	299	218	288	-	5	31	841	595	672	182	35	5	9	1,498	894	890	470	35	10	40	2,339
North Carolina	24	68	257	79	90	25	543	152	869	754	67	29	82	1,953	176	937	1,011	146	119	107	2,496
North Dakota	417	102	-	-	-	-	519	1,996	92	1	-	-	-	2,089	2,413	194	1	-	-	-	2,608
Ohio	45	140	443	30	48	17	723	865	652	111	22	3	-	1,653	910	792	554	52	51	17	2,376
Oklahoma	92	432	129	30	1	-	684	1,410	575	101	4	-	-	2,090	1,502	1,007	230	34	1	-	2,774
Oregon	93	271	177	7	7	-	555	1,234	900	400	20	35	23	2,612	1,327	1,171	577	27	42	23	3,167
Pennsylvania	1,097	-	-	-	-	-	1,097	1,782	-	-	-	-	-	1,782	2,879	-	-	-	-	-	2,879
Rhode Island	-	-	-	13	5	1	19	11	32	5	-	-	-	48	11	32	5	13	5	1	67
South Carolina	581	-	-	-	-	-	581	1,106	-	-	-	-	-	1,106	1,687	-	-	-	-	-	1,687
South Dakota	602	-	-	-	-	-	602	2,186	-	-	-	-	-	2,186	2,788	-	-	-	-	-	2,788
Tennessee	23	164	475	-	21	6	689	671	659	163	13	8	-	1,514	694	823	638	13	29	6	2,203
Texas	695	708	536	33	44	43	2,059	3,175	2,510	477	21	3	-	6,186	3,870	3,218	1,013	54	47	43	8,245
Utah	328	227	129	30	12	-	726	299	489	151	-	13	15	967	627	716	280	30	25	15	1,693
Vermont	92	117	70	-	-	1	280	32	187	89	3	1	7	319	124	304	159	3	1	8	599
Virginia	53	224	343	31	16	-	667	839	327	118	5	-	3	1,292	892	551	461	36	16	3	1,959
Washington	8	223	170	39	28	-	468	796	848	326	9	-	-	1,979	804	1,071	496	48	28	-	2,447
West Virginia	24	196	98	8	13	14	353	535	402	64	-	6	37	1,044	559	598	162	8	19	51	1,397
Wisconsin	478	-	-	-	-	-	478	2,461	-	-	-	-	-	2,461	2,939	-	-	-	-	-	2,939
Wyoming	483	315	19	-	-	-	817	1,448	395	81	27	-	10	1,961	1,931	710	100	27	-	10	2,778
U.S. Total	10,644	9,853	7,439	965	728	480	30,109	45,884	25,397	8,435	719	557	764	81,756	56,528	35,250	15,874	1,684	1,285	1,244	111,865
Puerto Rico	-	4	21	1	3	1	30	4	22	4	-	-	-	30	4	26	25	1	3	1	60
Grand Total	10,644	9,857	7,460	966	731	481	30,139	45,888	25,419	8,439	719	557	764	81,786	56,532	35,276	15,899	1,685	1,288	1,245	111,925

October 2009
Sheet 2 OF 2
Table HM-42

STATE	VOLUME-SERVICE FLOW RATIO (V/SF)
	INTERSTATE SYSTEM							OTHER							TOTAL
	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL	< 0.21	0.21-0.40	0.41-0.70	0.71-0.79	0.80-0.95	> 0.95	TOTAL
Alabama	-	52	118	65	58	74	367	86	309	269	32	19	32	747	86	361	387	97	77	106	1,114
Alaska	9	33	24	-	3	-	69	20	21	20	4	5	7	77	29	54	44	4	8	7	146
Arizona	4	39	58	10	21	56	188	39	147	167	18	61	52	484	43	186	225	28	82	108	672
Arkansas	-	33	80	16	40	38	207	73	88	63	16	17	5	262	73	121	143	32	57	43	469
California	2	55	181	154	344	443	1,179	64	248	557	203	464	205	1,741	66	303	738	357	808	648	2,920
Colorado	7	52	82	27	47	54	269	97	189	356	17	54	31	744	104	241	438	44	101	85	1,013
Connecticut	-	13	88	63	85	54	303	9	104	191	50	58	46	458	9	117	279	113	143	100	761
Delaware	2	4	25	2	8	-	41	11	28	67	6	9	5	126	13	32	92	8	17	5	167
Dist. of Columbia	-	-	2	2	7	2	13	1	10	34	6	11	7	69	1	10	36	8	18	9	82
Florida	9	20	345	131	94	119	718	96	325	616	81	164	89	1,371	105	345	961	212	258	208	2,089
Georgia	-	36	248	65	104	73	526	340	482	230	10	4	31	1,097	340	518	478	75	108	104	1,623
Hawaii	2	8	15	10	8	5	48	7	79	67	13	11	8	185	9	87	82	23	19	13	233
Idaho	5	36	18	11	6	15	91	22	40	26	2	2	3	95	27	76	44	13	8	18	186
Illinois	69	202	194	61	158	129	813	279	547	867	32	135	25	1,885	348	749	1,061	93	293	154	2,698
Indiana 2/	10	192	153	33	50	25	463	83	202	182	29	17	7	520	93	394	335	62	67	32	983
Iowa	2	22	69	17	36	6	152	163	160	71	11	-	-	405	165	182	140	28	36	6	557
Kansas	41	44	80	14	11	24	214	117	97	54	12	11	18	309	158	141	134	26	22	42	523
Kentucky	-	4	74	5	69	57	209	31	153	143	17	34	9	387	31	157	217	22	103	66	596
Louisiana	2	31	142	40	50	52	317	100	210	170	27	75	77	659	102	241	312	67	125	129	976
Maine	12	31	23	1	1	-	68	11	76	37	2	4	-	130	23	107	60	3	5	-	198
Maryland	7	11	74	50	105	52	299	22	100	286	35	61	22	526	29	111	360	85	166	74	825
Massachusetts	2	54	222	34	57	107	476	62	381	507	98	143	26	1,217	64	435	729	132	200	133	1,693
Michigan	202	-	-	-	-	432	634	712	-	-	-	-	663	1,375	914	-	-	-	-	1,095	2,009
Minnesota	5	7	51	20	79	120	282	57	119	169	74	46	70	535	62	126	220	94	125	190	817
Mississippi	1	62	83	4	40	18	208	100	148	116	14	38	37	453	101	210	199	18	78	55	661
Missouri	25	63	166	57	65	77	453	76	254	303	68	53	51	805	101	317	469	125	118	128	1,258
Montana	26	36	-	-	-	-	62	17	30	18	-	-	-	65	43	66	18	-	-	-	127
Nebraska	2	14	20	10	8	7	61	61	95	98	11	8	3	276	63	109	118	21	16	10	337
Nevada	22	18	17	11	23	34	125	15	33	47	8	17	24	144	37	51	64	19	40	58	269
New Hampshire	3	13	33	9	18	-	76	18	55	57	15	14	6	165	21	68	90	24	32	6	241
New Jersey	-	13	119	41	50	142	365	47	299	513	125	161	243	1,388	47	312	632	166	211	385	1,753
New Mexico	24	47	55	4	6	19	155	81	109	22	4	6	1	223	105	156	77	8	12	20	378
New York	48	165	252	126	74	196	861	202	540	757	113	126	239	1,977	250	705	1,009	239	200	435	2,838
North Carolina	5	25	198	103	119	133	583	88	216	286	62	90	79	821	93	241	484	165	209	212	1,404
North Dakota	19	22	11	-	-	-	52	30	17	20	-	-	-	67	49	39	31	-	-	-	119
Ohio	8	42	262	97	206	230	845	262	465	391	39	40	21	1,218	270	507	653	136	246	251	2,063
Oklahoma	15	68	73	29	29	34	248	118	131	78	19	11	8	365	133	199	151	48	40	42	613
Oregon	12	27	65	13	39	15	171	49	121	140	26	31	29	396	61	148	205	39	70	44	567
Pennsylvania	695	-	-	-	-	-	695	1,936	-	-	-	-	-	1,936	2,631	-	-	-	-	-	2,631
Rhode Island	-	2	20	3	13	12	50	9	51	66	10	17	3	156	9	53	86	13	30	15	206
South Carolina	235	-	-	-	-	-	235	660	-	-	-	-	-	660	895	-	-	-	-	-	895
South Dakota	77	-	-	-	-	-	77	74	-	-	-	-	-	74	151	-	-	-	-	-	151
Tennessee	4	48	166	48	49	103	418	57	257	276	67	54	42	753	61	305	442	115	103	145	1,171
Texas	46	144	413	138	253	179	1,173	513	1,077	1,284	309	442	413	4,038	559	1,221	1,697	447	695	592	5,211
Utah	9	35	82	10	51	25	212	14	62	98	21	18	40	253	23	97	180	31	69	65	465
Vermont	4	16	19	1	-	-	40	7	15	20	5	4	2	53	11	31	39	6	4	2	93
Virginia	19	53	207	56	88	26	449	121	302	446	36	41	52	998	140	355	653	92	129	78	1,447
Washington	2	39	164	30	56	7	298	83	214	212	41	51	20	621	85	253	376	71	107	27	919
West Virginia	-	92	93	9	5	1	200	39	102	70	4	2	5	222	39	194	163	13	7	6	422
Wisconsin	265	-	-	-	-	-	265	991	-	-	-	-	-	991	1,256	-	-	-	-	-	1,256
Wyoming	47	48	3	-	-	-	98	46	28	5	-	1	-	80	93	76	8	-	1	-	178
U.S. Total	2,005	2,071	4,887	1,630	2,633	3,195	16,421	8,216	8,736	10,472	1,792	2,630	2,756	34,602	10,221	10,807	15,359	3,422	5,263	5,951	51,023
Puerto Rico	2	53	114	23	32	9	233	12	30	37	4	19	13	115	14	83	151	27	51	22	348
Grand Total	2,007	2,124	5,001	1,653	2,665	3,204	16,654	8,228	8,766	10,509	1,796	2,649	2,769	34,717	10,235	10,890	15,510	3,449	5,314	5,973	51,371

1/ In 2001, updated capacity (service flow) calculation procedures were instituted in the HPMS data reporting process. The procedures are based on the Highway Capacity Manual 2000, published by the Transportation Research Board. For multilane facilities volume-service flow ratio is determined by dividing the peak traffic in the peak direction by the capacity. For all other facilities the ratio is determined by dividing the peak traffic by the capacity. Peak traffic is estimated as AADT *K, where K is the design hour volume (30th highest hour) as a percent of AADT. Some differences from other tables may be noted because these are estimated from sample data and do not include samples entirely on structures.

2/ Excludes 788 miles of Federal agency owned roads.