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	38 Grundy COUNTY
20	CO RD T19 INTERCHANGE	Rural	3.959	8300	40	6299	1961	44	182	52	6	199	1374	45	58	32860	7764
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.260	410	2	369	38	2	8	2	0	3	20	1	1	107	10
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.250	400	2	371	27	2	7	2	0	2	13	0	0	100	7
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.272	370	2	283	86	6	24	7	1	6	40	1	1	101	23
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.250	290	1	232	57	2	10	3	0	5	34	1	1	73	14
20	IA 14 INTERCHANGE	Rural	8.009	8400	41	6474	1884	40	163	47	5	194	1335	44	56	67276	15089
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.292	2110	12	1886	212	9	38	11	1	18	125	4	5	616	62
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.359	1810	10	1585	215	12	47	14	1	17	116	4	5	650	77
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.305	450	2	342	106	3	13	4	0	10	70	2	2	137	32
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.209	650	3	527	119	4	15	4	0	11	78	3	4	136	25
20	WEST LIMITS OF DIKE	Rural	6.486	11300	58	9157	2084	53	218	63	7	207	1428	47	61	73292	13517
20	CO RD T55 INTERCHANGE	Municipal	0.529	10900	56	8827	2017	52	212	61	7	200	1381	46	59	5766	1067
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.347	890	5	810	74	6	23	7	1	5	31	1	1	309	26
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.310	220	1	187	32	1	6	2	0	3	19	1	1	68	10
20	NORTH-WEST SOUTH-WEST LOOP	Municipal	0.177	260	2	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	62	9855	2082	58	240	69	8	203	1399	46	60	6156	1068
20	WEST LIMITS OF DIKE	Rural	0.749	12500	65	10284	2151	60	247	71	8	210	1446	48	62	9363	1611
20	EAST LIMITS OF DIKE	Municipal	0.290	12000	62	9855	2082	58	240	69	8	203	1399	46	60	3480	604
20	CO RD T69 INTERCHANGE AT
20	WEST LINE OF BLACK HAWK COUNTY	Rural	3.496	12500	65	10284	2151	60	247	71	8	210	1446	48	62	43700	7520
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	8989												228506	45754
	ROUTE SUMMARY - MUNICIPAL		2.346	6799												15951	2785