Skip to main content
U.S. flag

An official website of the United States government

This site is currently in beta, and your feedback is helping shape its ongoing development.

Seattle 20 Second Freeway

Published by US Department of Transportation | Department of Transportation | Metadata Last Checked: January 20, 2026 | Last Modified: 2012-05-31
This set of data files is one of the four test data sets acquired by the USDOT Data Capture and Management program. It contains the following data for the six months from May 1 2011 to October 31 2011: -Raw and cleaned data for traffic detectors deployed by Washington Department of Transportation (WSDOT) along I-5 in Seattle. Data includes 20-second raw reports. -Incident response records from the WSDOT's Washington Incident Tracking System (WITS). -A record of all messages and travel times posted on WSDOT's Active Traffic -Management signs and conventional variable message signs on I-5. -Loop detector volume and occupancy data from arterials parallel to I-5, estimated travel times on arterials derived from Automatic License Plate Reader (ALPR) data, and arterial signal timing plans. -Scheduled and actual bus arrival times from King County Metro buses and Sound Transit buses. -Incidents on I-5 during the six month period -Seattle weather data for the six month period -A dataset of GPS breadcrumb data from commercial trucks described in the documentation is not available to the public because of data ownership and privacy issues. This legacy dataset was created before data.transportation.gov and is only currently available via the attached file(s). Please contact the dataset owner if there is a need for users to work with this data using the data.transportation.gov analysis features (online viewing, API, graphing, etc.) and the USDOT will consider modifying the dataset to fully integrate in data.transportation.gov. Note: All extras are attached in Seattle Freeway Travel Times https://data.transportation.gov/Automobiles/Seattle-Freeway-Travel-Times/9v5g-t8u8

Complete Metadata

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov