Iowa DOT

Volume of Traffic on the Primary Road System

Route	2003	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2003				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	7400	54	5974	1371	22	176	84	17	265	726	51	30	22052	4086
20	IA 58 INTERCHANGE	Municipal	0.529	7200	53	5783	1364	21	172	82	16	265	726	51	30	3809	722
20	IA 27 INTERCHANGE AT EAST LIMITS OF CEDAR FALLS &
20	WEST LIMITS OF HUDSON	Municipal	1.091	9800	76	8342	1382	26	213	102	20	252	691	49	29	10692	1508
20	EAST LIMITS HUDSON &
20	WEST LIMITS WATERLOO	Municipal	0.376	17300	141	15483	1674	39	320	153	31	280	765	54	33	6505	629
20	US 63 INTERCHANGE	Municipal	1.684	17300	141	15483	1674	39	320	153	31	280	765	54	33	29133	2819
20	IA 21 INTERCHANGE	Municipal	3.042	21000	136	19024	1838	55	339	203	22	177	932	78	33	63882	5591
20	I 380 & US 218 WEST INTERCHANGE	Municipal	1.792	18700	120	16714	1865	53	327	195	21	184	969	81	35	33510	3342
20	DUPLICATE ROUTE WITH I 380 I 380 EAST INTERCHANGE TO
20	CO RD V51 INTERCHANGE	Rural	1.532	11500	91	10039	1368	23	189	90	18	259	708	50	30	17618	2096
20	WEST LINE OF BUCHANAN COUNTY	Rural	4.968	9600	75	8260	1264	20	165	79	16	244	666	47	28	47693	6280
	ROUTE SUMMARY - RURAL		9.480	9215												87363	12462
	ROUTE SUMMARY - MUNICIPAL		8.514	17328												147531	14611