Workers Ahead Sign

Updated July 9, 2026

Workers Ahead · MUTCD W21-1a · Construction Zone sign

What the Workers Ahead sign means

This orange diamond shows a worker symbol, warning that road workers are on or near the roadway ahead. Slow down, move over if a lane is available, and be prepared to stop for flaggers directing traffic. Watch closely for people on foot close to your lane. It is posted just ahead of active work so you are ready to protect the crew. Work-zone speed limits are strictly enforced and fines are frequently doubled, so reduce speed and stay alert until you have fully passed the activity.

What to do when you see it

Slow down, give workers room, and be ready to stop for flaggers; stay alert until you are past the work area.

On the CA permit test

The orange worker-symbol diamond warns crews are on or beside the road — slow down and protect them.

📱 Study smarter: PermitPal in your browser turns your state's handbook into short lessons, sign games, and real-format mock exams. Free to start — $29.99 once for everything, or $6.99 a week in the app. Also on the App Store and Google Play.