Traffic count data

Get access to data and statistics collected through our vehicular traffic data monitoring program.

Overview

We publish data collected through our vehicular traffic data monitoring program, in which we collect and maintain data on the state route system from a network of permanent and short-duration traffic counters. Data includes hourly or sub-hourly vehicle volume, classification, speed and weight data, which is used to produce annualized statistics and reports.

Data reporting applications

Directional and combined-direction summary statistics for our network of permanent and short-duration count locations are available through our Traffic Data Reporting System. This application also includes more granular (daily, hourly, 15-minute) count data collected at each permanent location, as well as recently collected granular data at many short count locations. For assistance with this application, including accessing and extracting data, please see our Help and User’s Guide (PDF 2.0MB).

Alternate reporting systems

Annual Traffic Report

The Annual Traffic Report summarized traffic data maintained by the Washington State Department of Transportation for the state highway system, but as of 2018 is no longer published. Point-specific traffic volume data is now available through the data reporting application and datasets listed above. Vehicle Miles of Travel data is available on our Annual mileage and travel information page. Recent publications of the Annual Traffic Report are available electronically through the Washington State Library website. Other reports are available in hard copy through the library. Please contact the State Library to access these reports. 

Traffic data requests

To make a special request for traffic data, please fill out our Request for Traffic Data (PDF 739KB) form. A directory of permanent traffic recorders (PTR) is included in the form for reference.

 

Get a list of the year’s 200-highest traffic hours and associated vehicle volumes from our network of traffic recorders permanently installed in Washington State highways. This report helps project designers, planners and traffic engineers estimate the volume of traffic used in the design process.

Find summarized vehicle speed data from our network of traffic recorders permanently installed in Washington State highways. This data may be used to evaluate vehicle speed trends to assist in highway design and safety improvements.

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