Iowa DOT

Volume of Traffic on the Primary Road System

Route	2012	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2012				Motorcylces	Cars, vans and pickups	Total trucks and buses	Single unit trucks				Combination trucks				All vehicles	Trucks and buses
	Primary route section description							Single unit trucks				Combination trucks
	Primary route section description							Buses	2Axles	3Axles	4 or more axles	4 or less axles	5Axles	6 or more axles	Multiple trailers
20	7 Black Hawk COUNTY
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.285	490	3	459	28	2	9	3	0	2	11	0	0	140	8
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.269	430	3	411	16	2	7	2	0	1	4	0	0	116	4
20	WEST LIMITS OF CEDAR FALLS	Rural	2.981	13000	68	10747	2184	64	261	75	8	211	1455	48	62	38753	6511
20	IA 58 INTERCHANGE	Municipal	0.523	12600	66	10419	2115	62	254	73	8	204	1408	47	61	6590	1106
20	EAST-NORTH EAST-NORTH RAMP	Municipal	0.298	2600	15	2436	149	5	22	6	1	14	94	3	4	775	44
20	SOUTH-EAST RAMP	Municipal	0.298	300	2	274	24	2	8	2	0	1	9	0	0	89	7
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.360	860	5	801	54	3	13	4	0	4	27	1	1	310	19
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.261	850	5	801	44	2	8	2	0	4	25	1	1	222	11
20	NORTH-EAST LOOP	Municipal	0.261	2170	13	2068	89	4	15	4	0	8	53	2	2	566	23
20	IA 27 INTERCHANGE AT EAST LIMITS OF CEDAR FALLS &
20	WEST LIMITS OF HUDSON	Municipal	1.091	15900	86	13537	2277	67	277	79	9	219	1511	50	64	17347	2484
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.292	5700	33	5260	406	30	122	35	4	26	176	6	7	1664	119
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.218	6100	36	5608	456	34	139	40	4	28	196	6	8	1330	99
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.267	860	5	778	77	3	12	3	0	7	48	2	2	230	21
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.242	1160	7	1034	119	5	22	6	1	10	70	2	2	281	29
20	EAST LIMITS HUDSON &
20	WEST LIMITS WATERLOO *	Municipal	0.385	25700	143	22613	2943	123	505	145	16	256	1766	58	75	9895	1133
20	US 63 INTERCHANGE *	Municipal	1.675	25700	143	22613	2943	123	505	145	16	256	1766	58	75	43048	4930
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.366	2910	17	2638	255	18	72	21	2	17	116	4	5	1065	93
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.360	3230	19	2976	235	14	60	17	2	17	116	4	5	1163	85
20	NORTH-WEST SOUTH-WEST LOOP	Municipal	0.218	1090	6	985	99	6	24	7	1	7	50	2	2	238	22
20	WEST-NORTH WEST-SOUTH LOOP	Municipal	0.311	950	5	866	78	4	15	4	0	7	45	1	1	295	24
20	ANSBOROUGH AVENUE INTERCHANGE *	Municipal	1.532	29800	74	26469	3255	82	705	126	21	343	1585	167	227	45654	4987
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.258	1350	4	1304	42	4	30	5	1	0	1	0	0	348	11
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.264	2490	7	2416	67	5	45	8	1	1	5	1	1	657	18
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.249	2270	6	2197	66	4	38	7	1	2	11	1	1	565	16
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.316	1390	4	1347	39	3	23	4	1	1	5	1	1	439	12
20	IA 21 INTERCHANGE *	Municipal	1.508	27700	69	24424	3205	79	677	121	20	341	1576	166	226	41772	4833
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.342	3350	9	3218	122	6	51	9	1	8	38	4	5	1146	42
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.280	3300	9	3232	59	3	26	5	1	4	17	2	3	924	17
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.342	4300	12	4157	131	7	61	11	2	7	34	4	5	1471	45
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.280	4560	12	4409	139	7	60	11	2	9	41	4	6	1277	39
20	I 380 & US 218 WEST INTERCHANGE	Municipal	1.782	25500	63	22318	3117	74	633	113	18	336	1556	164	223	45441	5554
20	DUPLICATE ROUTE WITH I 380 I 380 EAST INTERCHANGE TO
20	CO RD V51 INTERCHANGE	Rural	1.511	13000	72	11364	1564	64	265	76	8	137	943	31	39	19643	2363
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.280	180	1	159	20	0	2	1	0	2	14	0	0	50	6
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.280	150	1	125	25	0	2	1	0	3	18	1	1	42	7
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.379	1070	6	1005	58	6	26	8	1	2	14	0	0	406	22
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.267	1160	7	1089	64	5	21	6	1	4	25	1	1	310	17
20	WEST LINE OF BUCHANAN COUNTY	Rural	4.973	11100	61	9551	1489	54	222	63	7	136	936	31	39	55200	7405
	ROUTE SUMMARY - RURAL		11.225	10215												114660	16343
	ROUTE SUMMARY - MUNICIPAL		14.579	15419												224802	25823