Iowa DOT

Volume of Traffic on the Primary Road System

Route	2005	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2005				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	WEST LIMITS OF CEDAR FALLS	Rural	2.981	11800	89	9695	2015	32	187	80	10	483	1109	77	37	35176	6007
20	IA 58 INTERCHANGE	Municipal	0.523	11800	89	9695	2015	32	187	80	10	483	1109	77	37	6171	1054
20	IA 27 INTERCHANGE AT EAST LIMITS OF CEDAR FALLS &
20	WEST LIMITS OF HUDSON	Municipal	1.091	15400	120	13118	2161	43	247	106	14	496	1139	79	39	16801	2358
20	EAST LIMITS HUDSON &
20	WEST LIMITS WATERLOO	Municipal	0.385	23200	188	20429	2581	55	319	137	18	581	1334	92	45	8932	994
20	US 63 INTERCHANGE	Municipal	1.675	23200	188	20429	2581	55	319	137	18	581	1334	92	45	38860	4323
20	IA 21 INTERCHANGE	Municipal	3.038	26700	197	23568	2932	62	367	221	18	441	1625	131	66	81115	8907
20	I 380 & US 218 WEST INTERCHANGE	Municipal	1.820	24400	179	21357	2862	58	340	204	17	437	1610	130	66	44408	5209
20	DUPLICATE ROUTE WITH I 380 I 380 EAST INTERCHANGE TO
20	CO RD V51 INTERCHANGE	Rural	1.512	12000	95	10327	1578	41	236	101	13	336	772	53	26	18144	2386
20	WEST LINE OF BUCHANAN COUNTY	Rural	4.973	10200	79	8615	1505	36	208	89	11	328	755	52	25	50725	7484
	ROUTE SUMMARY - RURAL		9.466	10991												104045	15877
	ROUTE SUMMARY - MUNICIPAL		8.532	23006												196287	22845