Generalized diagram of this intersection's form.

NW 99th St. / NW 21st Av.

Use the tabs below to select various information provided for this intersection. The first tab offers a map of the intersection location, and a means of locating nearby count locations. Data for each intersection is offered by “leg” which is, at times, not entirely intuitive. Waving your mouse over the names above should clear up any ambiguities. Directional Average Weekday (24 hour average), AM Peak Hour (7-8 a.m.), PM Peak Hour (peak hour between 4-6 p.m.), and PM Peak Turn Movement (right, left, and through), are included in the summary. The final tab provides scanned PDF documents (where available) of the original count data for this intersection.

Location
North Leg
South Leg
East Leg
West Leg
Scans

Aerial Map

North Leg Traffic Counts (NW 21st Av.)

Year	NB ADT	SB ADT	ADT	NB PM	SB PM	NB AM	SB AM
2021	2302	2149	4451	217	155	159	208
2018	0	0	0	0	0	0	0
2017	1994	1923	3917	201	162	79	179
2003	2114	2291	4405	260	178	64	222
2002	2560	2384	4944	268	163	83	205
1997	2190	1999	4189	261	141	48	178
1990	0	0	3210	0	0	0	0
1988	1371	1377	2748	0	0	0	0
1987	0	0	2623	0	0	0	0
1985	0	0	3224	0	0	0	0

South Leg Traffic Counts (NW 21st Av.)

Year	NB ADT	SB ADT	ADT	NB PM	SB PM	NB AM	SB AM
2021	1129	1059	2189	100	102	113	111
2018	1318	1312	2630	103	125	162	157
2017	0	0	0	0	0	0	0
2003	675	1927	2602	62	155	43	153
2002	1435	1502	2937	105	111	60	117
1997	981	1075	2057	86	104	31	39
1990	779	820	1599	83	84	0	0
1988	679	514	1193	0	0	0	0
1987	0	0	1346	0	0	0	0
1985	0	0	1435	0	0	0	0

East Leg Traffic Counts (NW 99th St.)

Year	EB ADT	WB ADT	ADT	EB PM	WB PM	EB AM	WB AM
2021	0	0	0	0	0	0	0
2018	0	0	0	0	0	0	0
2017	0	0	0	0	0	0	0
2003	6079	6495	12575	441	647	448	317
2002	0	0	10595	219	549	182	204
1997	5526	5485	11011	1005	596	570	144
1990	3995	4232	8227	325	460	0	0
1988	3532	3540	7072	0	0	0	0
1987	0	0	6264	0	0	0	0
1985	0	0	5466	0	0	0	0

West Leg Traffic Counts (NW 99th St.)

Year	EB ADT	WB ADT	ADT	EB PM	WB PM	EB AM	WB AM
2021	0	0	0	0	0	0	0
2018	0	0	0	0	0	0	0
2017	0	0	0	0	0	0	0
2003	3715	3385	7100	310	320	262	165
2002	3611	3716	7327	285	343	262	169
1997	3170	3251	6421	261	324	204	131
1990	2568	2792	5361	223	297	0	0
1988	2443	2442	4885	0	0	0	0
1987	0	0	4088	0	0	0	0
1985	0	0	5477	0	0	0	0