Construction

Find information on construction materials and construction guidance.

Construction materials

Find approved construction materials, submit new materials for approval, or review our materials evaluation and tracking programs.

Construction guidance

Find information needed to ensure compliance during the construction of a project.

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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.