Traffic Counts by Study

This table provides location data and summary statistics of each traffic study. The SDOT Traffic Counts group runs studies across the city to collect traffic volumes. Most studies are done with pneumatic tubes, but some come from video systems as well. Use the field study_id to match it with other tables for more detailed information. Data are binned in 15 minute and 60 minute bins in other tables.

LANE_DESIGNATION_CODE_ID 1     Standard 2     Right Turn 3     Left Turn 4     Thru Only 5     Thru + Right Turn 6     Thru + Left Turn 7     Aggregate Element 8     Anomaly / Special Event 9     Unknown 10    0 11    1 12    2 13    3 14    4 15    5 16    6

TRAFFIC_FLOW_DIR_ID: 1 N 2 S 3 E 4 W 5 NE 6 SE 7 SW 8 NW 9 REV 10 UNKNOWN 11 TOTAL

Data and Resources

Additional Info

Field Value
Source https://cos-data.seattle.gov/resource/xucb-vzhc
Author Conor, Jeffrey
Last Updated September 2, 2025, 02:36 (UTC)
Created July 22, 2025, 19:54 (UTC)
Category Transportation
Contact Email open.data@seattle.gov
Department Seattle Department of Transportation
Frequency Daily
Publisher data.seattle.gov