Iowa DOT

Volume of Traffic on the Primary Road System

Route	2015	Rural/Municipal	Section length (miles)	Annual average daily traffic	Vehicle classification distribution of annual average daily traffic											Average daily vehicle miles
	2015				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	8900	35	6507	2359	53	260	57	6	190	1637	66	90	35235	9339
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.260	500	2	393	104	3	16	3	0	8	67	3	4	0	0
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.250	440	2	332	106	3	16	3	0	8	69	3	4	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.272	420	2	324	94	2	10	2	0	8	65	3	4	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.250	370	2	282	86	1	4	1	0	8	66	3	4	0	0
20	IA 14 INTERCHANGE	Rural	8.009	9100	36	6676	2389	57	277	61	6	190	1641	66	90	72882	19134
20	EAST-NORTH EAST-SOUTH RAMP	Rural	0.292	2350	10	1902	437	26	129	28	3	24	206	8	11	0	0
20	NORTH-EAST SOUTH-EAST RAMP	Rural	0.359	2230	10	1814	406	15	75	16	2	29	246	10	14	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.305	710	3	622	85	1	6	1	0	7	64	3	4	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.209	540	2	455	83	1	6	1	0	7	62	2	3	0	0
20	WEST LIMITS OF DIKE	Rural	6.486	12400	49	9288	3063	96	469	103	11	228	1968	79	107	80426	19867
20	CO RD T55 INTERCHANGE	Municipal	0.529	12100	50	9333	2717	56	277	61	6	222	1913	77	105	6401	1437
20	EAST-NORTH EAST-SOUTH RAMP	Municipal	0.347	960	3	653	303	14	69	15	2	19	168	7	9	0	0
20	WEST-NORTH WEST-SOUTH RAMP	Municipal	0.310	300	1	229	70	1	6	1	0	6	51	2	3	0	0
20	NORTH-WEST SOUTH-WEST LOOP	Municipal	0.177	220	1	159	60	1	6	1	0	5	43	2	3	0	0
20	NORTH-EAST SOUTH-EAST LOOP	Municipal	0.180	710	2	406	302	12	60	13	1	21	178	7	9	0	0
20	EAST LIMITS OF DIKE	Municipal	0.513	13200	52	9698	3451	117	574	126	13	251	2163	87	119	6772	1770
20	WEST LIMITS OF DIKE	Rural	0.749	13600	53	9998	3549	120	590	130	13	258	2225	89	121	10186	2658
20	EAST LIMITS OF DIKE	Municipal	0.290	13200	52	9698	3451	117	574	126	13	251	2163	87	119	3828	1001
20	CO RD T69 INTERCHANGE AT
20	WEST LINE OF BLACK HAWK COUNTY	Rural	3.496	13600	53	9998	3549	120	590	130	13	258	2225	89	121	47546	12407
20	WEST-NORTH WEST-SOUTH RAMP	Rural	0.278	350	2	326	22	2	11	2	0	1	5	0	0	0	0
20	NORTH-WEST SOUTH-WEST RAMP	Rural	0.246	390	2	362	26	3	14	3	0	1	5	0	0	0	0
	ROUTE SUMMARY - RURAL		25.420	9785												246275	63405
	ROUTE SUMMARY - MUNICIPAL		2.346	7499												17001	4208