Iowa DOT

Volume of Traffic on the Primary Road System

Route	2004	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2004				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	2.980	11800	90	10050	1659	30	193	87	14	326	909	65	33	35164	4944
20	IA 58 INTERCHANGE	Municipal	0.529	11800	90	10050	1659	30	193	87	14	326	909	65	33	6242	878
20	IA 27 INTERCHANGE AT EAST LIMITS OF CEDAR FALLS &
20	WEST LIMITS OF HUDSON	Municipal	1.091	14700	116	12880	1703	38	243	110	18	317	882	63	32	16038	1858
20	EAST LIMITS HUDSON &
20	WEST LIMITS WATERLOO	Municipal	0.376	22200	176	19617	2405	52	338	153	25	449	1251	90	46	8347	904
20	US 63 INTERCHANGE	Municipal	1.684	22200	176	19617	2405	52	338	153	25	449	1251	90	46	37385	4050
20	IA 21 INTERCHANGE	Municipal	3.042	26000	169	22999	2828	57	353	208	18	410	1585	128	69	79092	8603
20	I 380 & US 218 WEST INTERCHANGE	Municipal	1.792	21900	139	18892	2865	52	324	191	16	427	1650	133	71	39245	5134
20	DUPLICATE ROUTE WITH I 380 I 380 EAST INTERCHANGE TO
20	CO RD V51 INTERCHANGE	Rural	1.532	12200	94	10476	1629	37	237	107	18	301	838	60	31	18690	2496
20	WEST LINE OF BUCHANAN COUNTY	Rural	4.968	10400	79	8788	1533	33	211	95	16	288	803	57	30	51667	7616
	ROUTE SUMMARY - RURAL		9.480	11131												105521	15056
	ROUTE SUMMARY - MUNICIPAL		8.514	21887												186349	21427