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.

Incident Response Program

Learn about the WSDOT Incident Response Program - a traffic congestion mitigation strategy consisting of responding to, investigating, cleaning up, and clearing 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.

Website feedback: Tell us how we're doing.

Winter driving tips

Slow down on ice and snow.

It's easier to skid or lose control traveling at higher speeds. Give yourself more time to stop.

Carry chains, practice installing them.

Winter conditions could mean chains are required on your route. Practice putting them on your vehicle ahead of time.

Pack your winter car kit.

Carry extra supplies like warm clothing, ice scraper and brush, jumper cables and other emergency items.