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Speed monitoring trailer

Speed monitoring trailers - sign boards on trailers that display the speed of passing vehicles - are used by police departments as educational tools that can enhance enforcement efforts directed at speed compliance. Speed radar trailers are best used in residential areas and may be used in conjunction with Neighborhood Speed Watch or other neighborhood safety education programs. They can help raise residents’ awareness of how they themselves are often those speeding, not just “outsiders.” Speed trailers are not substitutes for permanent actions such as traffic calming treatments to address neighborhood speeding issues.

Speed trailers can be used at several locations and should have occasional police monitoring and enforcement to maintain driver respect.

Speed monitoring trailers let motorists know the speed limit and the speed they are traveling.

The material provided on this page is from the FHWA publication "Pedestrian Facilities User Guide." This guide is currently under review by practicioners and others in the field. Subsequently, the material provided on this page is subject to change in the future.

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speed monitoring trailer

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on-street parking


• Enhance enforcement efforts through public education and awareness.


• Occasional enforcement is needed to supplement the speed trailers.

• Speed trailers are not a substitute for engineering measures.

Estimated Cost:

$10,000 plus the costs to move the trailer to different locations.

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