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Traffic safety methods

Find details about the methods we use to keep travelers safe, including roundabouts, road equipment and striping, and workzone safety information.

Collector/distributor ramps

Learn about collector/distributors and how they improve traffic flow on freeways.

Diverging diamond interchange

Learn about diverging diamond interchanges, a proven way to move more people and reduce the potential for collisions.

Roundabouts

Learn about roundabouts, including how to travel through them as a pedestrian, cyclist or driver.

Rumble Strips

Learn about how we use rumble strips to keep vehicles on the roadway and reduce the frequency of collisions.

Striping

Basic information about annual roadway re-striping work, and how you can help.

Work zone safety

Find important information about traveling in and around roadway work zones, including information on traffic control training and certifications.

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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.