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	38 Grundy COUNTY
20	CO RD T19 INTERCHANGE	Rural	3.959	8200	35	6229	1935	42	180	53	6	196	1363	42	54	32464	7661
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.260	400	2	360	38	2	8	2	0	3	21	1	1	104	10
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.250	390	2	361	27	2	7	2	0	2	13	0	0	98	7
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.272	360	2	273	85	6	24	7	1	6	40	1	1	98	23
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.250	290	1	232	56	2	10	3	0	5	33	1	1	73	14
20	IA 14 INTERCHANGE	Rural	8.009	8300	36	6403	1860	38	161	47	5	190	1325	41	53	66475	14897
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.292	2080	10	1861	209	9	37	11	1	18	124	4	5	607	61
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.359	1790	9	1569	212	11	47	14	1	16	115	4	5	643	76
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.305	440	2	333	105	3	13	4	0	10	69	2	2	134	32
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.209	640	3	519	118	4	15	5	0	11	77	2	3	134	25
20	WEST LIMITS OF DIKE	Rural	6.486	11200	51	9090	2058	50	216	63	7	203	1418	43	57	72643	13348
20	CO RD T55 INTERCHANGE	Municipal	0.529	10900	50	8830	2019	50	213	62	7	200	1391	43	56	5766	1068
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.347	890	5	812	74	5	23	7	1	4	31	1	1	309	26
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.310	220	1	186	32	1	6	2	0	3	19	1	1	68	10
20	NORTH-WEST SOUTH-WEST LOOP	Municipal	0.177	260	1	241	18	1	4	1	0	1	10	0	0	46	3
20	NORTH-EAST SOUTH-EAST LOOP	Municipal	0.180	700	4	657	39	3	14	4	0	2	14	0	0	126	7
20	EAST LIMITS OF DIKE	Municipal	0.513	12000	56	9860	2084	56	241	70	8	202	1408	43	57	6156	1069
20	WEST LIMITS OF DIKE	Rural	0.749	12300	57	10119	2123	57	245	72	8	206	1435	44	58	9213	1590
20	EAST LIMITS OF DIKE	Municipal	0.290	12000	56	9860	2084	56	241	70	8	202	1408	43	57	3480	604
20	CO RD T69 INTERCHANGE AT
20	WEST LINE OF BLACK HAWK COUNTY	Rural	3.496	12300	57	10119	2123	57	245	72	8	206	1435	44	58	43001	7422
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.278	220	1	212	7	0	1	0	0	1	4	0	0	61	2
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.246	140	1	135	4	0	1	0	0	0	2	0	0	34	1
	ROUTE SUMMARY - RURAL		25.420	8882												225782	45169
	ROUTE SUMMARY - MUNICIPAL		2.346	6799												15951	2787