Driver's License Test Prep
Orange diamond with black text reading MOVING OPERATIONS AHEAD
MUTCD
W21-9
Category
work zone
Color
orange
Shape
diamond
National · MUTCD Sign Reference

Moving Operations Ahead

Slow-moving work vehicles are operating in or along the lane ahead.

Warns drivers of mobile work operations such as line-painting, sweeping, mowing, or pothole patching that move continuously along the road. Reduce speed, do not pass on the shoulder, and follow any pace vehicle or flagger until clear of the operation.

In the same family

Related signs

Vertical red-and-orange panel. Red top half with white text NO STANDING ANYTIME and a white double-headed horizontal arrow. Bottom orange band with black hard-hat icon and TEMPORARY CONSTRUCTION REGULATION. Code SP-383B.
No Standing Anytime: Temporary Construction Regulation
Vertical red-and-orange panel. Red top half with white text NO STANDING ANYTIME and a white horizontal arrow pointing left. Bottom orange band with hard-hat icon and TEMPORARY CONSTRUCTION REGULATION text.
No Standing Anytime: Construction (Arrow Left)
Vertical red-and-orange panel. Red top half with white text NO STANDING ANYTIME and a white horizontal arrow pointing right. Bottom orange band with hard-hat icon and TEMPORARY CONSTRUCTION REGULATION text.
No Standing Anytime: Construction (Arrow Right)
Orange diamond with black border reading CHECK POINT AHEAD on three lines in black uppercase letters.
Check Point Ahead
Orange diamond with black border reading SOBRIETY CHECK POINT AHEAD on three lines in black uppercase letters.
Sobriety Check Point Ahead
Source

Wikimedia Commons: File:MassDOT MA-W21-9.svg (Public domain)

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