Operations & services

Learn about the tools we use to reduce traffic congestion and collisions, including ramp meters, traffic management centers, traffic signals and our incident response team.

Active Traffic and Demand Management

Learn about Active Traffic and Demand Management (ATDM), an operational strategy for reducing collisions associated with congestion and blocked lanes.

Avalanche control

Learn about our avalanche forecasting and control efforts to keep our transportation system reliable and safe.

The Incident Response program is a traffic congestion mitigation strategy. The Incident Response Team (IRT) is composed of agencies, vendors, and other resources that respond to, investigate, clean up, and clear traffic incidents.

Ramp meters

Learn about ramp meters and how they work.

Snow and ice plan

Learn about how we prepare and prioritize our response to winter weather driving conditions.

Tire chain installation

WSDOT issues permits allowing businesses and individuals to install and remove motorist-owned tire chains

Traffic Management Centers (TMCs)

Learn about the central command centers for WSDOT's highway monitoring and response efforts.

Traffic signals

Learn more about how traffic signals operate, and how and when they are installed.

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Learn more about work zone safety

Slow down – lives are on the line.

In 2023, speeding continued to be a top reason for work zone crashes.

Even one life lost is too many.

Fatal work zone crashes doubled in 2023 - Washington had 10 fatal work zone crashes on state roads.

It's in EVERYONE’S best interest.

95% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.