Iowa DOT

Volume of Traffic on the Primary Road System

Route	2016	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2016				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	9200	35	7089	2076	53	270	57	7	155	1390	60	85	36423	8219
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.260	520	2	421	97	3	17	4	0	7	60	3	4	0	0
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.250	450	2	349	99	3	17	4	0	7	62	3	4	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.272	430	2	323	106	2	10	2	0	8	75	3	4	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.250	380	1	281	98	1	4	1	0	8	76	3	4	0	0
20	IA 14 INTERCHANGE	Rural	8.009	9400	36	7297	2067	56	289	61	7	151	1361	58	83	75285	16555
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.292	2420	10	2009	401	26	135	28	3	19	171	7	10	0	0
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.359	2300	9	1922	368	15	78	16	2	24	212	9	13	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.305	730	3	620	107	1	6	1	0	9	81	3	4	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.209	560	2	453	105	1	6	1	0	9	80	3	4	0	0
20	WEST LIMITS OF DIKE	Rural	6.486	12800	50	10128	2622	96	488	103	12	176	1583	68	97	83021	17006
20	CO RD T55 INTERCHANGE	Municipal	0.529	12800	50	10128	2622	96	488	103	12	176	1583	68	97	6771	1387
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.347	980	3	687	289	14	71	15	2	17	154	7	10	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.310	310	1	218	91	1	6	1	0	8	68	3	4	0	0
20	NORTH-WEST SOUTH-WEST LOOP	Municipal	0.177	220	1	139	81	1	6	1	0	7	60	3	4	0	0
20	NORTH-EAST SOUTH-EAST LOOP	Municipal	0.180	720	2	430	288	12	62	13	2	18	164	7	10	0	0
20	EAST LIMITS OF DIKE	Municipal	0.513	14000	54	10913	3033	120	615	130	15	197	1772	76	108	7182	1556
20	WEST LIMITS OF DIKE	Rural	0.749	14000	54	10913	3033	120	615	130	15	197	1772	76	108	10486	2272
20	EAST LIMITS OF DIKE	Municipal	0.290	14000	54	10913	3033	120	615	130	15	197	1772	76	108	4060	880
20	CO RD T69 INTERCHANGE AT
20	WEST LINE OF BLACK HAWK COUNTY	Rural	3.496	14000	54	10913	3033	120	615	130	15	197	1772	76	108	48944	10603
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.278	360	2	336	22	2	11	2	0	1	5	0	0	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.246	400	2	371	27	3	15	3	0	1	5	0	0	0	0
	ROUTE SUMMARY - RURAL		25.420	10098												254159	54655
	ROUTE SUMMARY - MUNICIPAL		2.346	7936												18013	3823