Iowa DOT

Volume of Traffic on the Primary Road System

Route	2011	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2011				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	480	3	449	28	2	9	3	0	2	12	0	0	137	8
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.269	420	2	402	16	2	7	2	0	1	4	0	0	113	4
20	WEST LIMITS OF CEDAR FALLS	Rural	2.981	12800	60	10584	2156	60	259	76	8	207	1444	44	58	38157	6427
20	IA 58 INTERCHANGE	Municipal	0.523	12600	59	10423	2117	59	254	74	8	203	1418	43	57	6590	1107
20	EAST-NORTH EAST-NORTH RAMP	Municipal	0.298	2600	14	2437	149	5	22	6	1	14	95	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	26	1	1	222	11
20	NORTH-EAST LOOP	Municipal	0.261	2170	12	2069	89	4	15	5	0	8	54	2	2	566	23
20	IA 27 INTERCHANGE AT EAST LIMITS OF CEDAR FALLS &
20	WEST LIMITS OF HUDSON	Municipal	1.091	15900	76	13543	2279	65	278	81	9	218	1521	47	61	17347	2486
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.292	5700	30	5264	406	29	123	36	4	25	177	5	6	1664	119
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.218	6100	32	5612	456	32	139	41	4	28	197	6	8	1330	99
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.267	860	4	779	77	3	12	3	0	7	49	1	1	230	21
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.242	1160	6	1035	119	5	22	6	1	10	70	2	2	281	29
20	EAST LIMITS HUDSON &
20	WEST LIMITS WATERLOO *	Municipal	0.385	25700	127	22625	2946	118	507	148	16	255	1777	54	71	9895	1134
20	US 63 INTERCHANGE *	Municipal	1.675	25700	127	22625	2946	118	507	148	16	255	1777	54	71	43048	4935
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.366	2910	15	2640	255	17	73	21	2	17	117	4	5	1065	93
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.360	3230	17	2978	235	14	60	17	2	17	117	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	867	78	3	15	4	0	7	45	1	1	295	24
20	ANSBOROUGH AVENUE INTERCHANGE *	Municipal	1.532	29800	72	26470	3258	78	694	137	24	328	1597	164	234	45654	4991
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.258	1350	4	1305	42	3	30	6	1	0	1	0	0	348	11
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.264	2490	7	2417	67	5	45	9	2	1	5	0	0	657	18
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.249	2270	6	2198	66	4	37	7	1	2	11	1	1	565	16
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.316	1390	4	1347	39	3	23	5	1	1	5	1	1	439	12
20	IA 21 INTERCHANGE *	Municipal	1.508	27700	66	24426	3208	75	666	132	24	327	1588	163	232	41772	4838
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.342	3080	8	2950	122	6	50	10	2	8	38	4	6	1053	42
20	NORTH-EAST SOUTH-EAST RAMP	Municipal	0.280	3030	8	2963	59	3	25	5	1	4	17	2	3	848	17
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.342	4300	11	4158	131	7	60	12	2	7	34	4	5	1471	45
20	NORTH-WEST SOUTH-WEST RAMP	Municipal	0.280	4560	12	4409	139	7	59	12	2	8	41	4	6	1277	39
20	I 380 & US 218 WEST INTERCHANGE	Municipal	1.782	25000	59	21821	3120	70	623	123	22	322	1568	161	230	44550	5560
20	DUPLICATE ROUTE WITH I 380 I 380 EAST INTERCHANGE TO
20	CO RD V51 INTERCHANGE	Rural	1.511	12500	61	10894	1544	61	262	77	8	134	936	29	37	18888	2333
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	124	25	0	2	1	0	3	18	1	1	42	7
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.379	920	5	858	57	6	26	8	1	2	14	0	0	349	22
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.267	1000	5	930	64	5	21	6	1	4	26	1	1	267	17
20	WEST LINE OF BUCHANAN COUNTY	Rural	4.973	11000	53	9476	1470	51	220	64	7	133	929	28	36	54703	7310
	ROUTE SUMMARY - RURAL		11.225	10041												112706	16134
	ROUTE SUMMARY - MUNICIPAL		14.579	15347												223742	25847