Southwest Washington Regional Transportation Council

399th St. / SR - 503/221st 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.

Aerial Map

 

North Leg Traffic Counts (SR - 503/221st Av)

Year NB ADT SB ADT ADT NB PM SB PM NB AM SB AM
20180000000
201519731972394618416181148
201215771556313413413770102
20080000000
2005201319353948181151108109
20040000000
200218931896378919915979124
19991762163433961781556294
1996402272674443299
19933722736453330128
19901451147829291311096789
19830000000
19820000000
19810000000

South Leg Traffic Counts (SR - 503/221st Av)

Year NB ADT SB ADT ADT NB PM SB PM NB AM SB AM
20180000000
2015130311762480118995676
20120000000
20080000000
20050000000
20040000000
20020000000
19990000000
19962249109133402377410383
19930000000
19900000000
19830024000000
19820022500000
19810021500000

West Leg Traffic Counts (399th St.)

Year EB ADT WB ADT ADT EB PM WB PM EB AM WB AM
2018198420003984212151125192
20150000000
201216501589323917014257109
200817781728350620012271123
200518711836370718814987112
20041900185137501981494997
20020000000
199918351739357419916757101
19960000000
19930000000
19900000000
19830000000
19820000000
19810000000