California Construction Zone Signs

Updated July 9, 2026

Construction and maintenance signs warn you that crews, equipment, or lane changes are ahead in a temporary work zone. They are the same diamond shape as warning signs but colored orange — the color reserved only for road work. Work-zone speed limits are strictly enforced and fines are frequently doubled, so slow down the moment you see orange.

How to read construction zone signs

Orange is the giveaway: an orange diamond means a temporary construction or maintenance zone. Expect workers on foot, flaggers directing traffic, sudden lane shifts, and reduced speed limits until you pass an END ROAD WORK sign.

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All construction zone signs (2)

Road Work Ahead W20-1 Workers Ahead W21-1a