Device name(s): Radar Speed Monitoring Trailers

Radar Speed Monitering Trailers

Approximate Cost:

Definition: A SMART set (Speed Monitoring Awareness Radar Trailer) is a portable, self-contained speed display unit. This unit operates on batteries that are charged by either a 110-volt power source or attached solar cells. A fully charged unit, without available sunlight, may be used for up to three days depending on traffic volume.  A mobile radar display sign informs drivers of their traveling speed.

Fast Facts:

  • Can be used on Local Street- yes
  • Can be used on Collector-
  • Can be used on Arterial-
  • Reduces Speed- yes
  • Reduces Volume- no
  • Noise Impact- no
  • Restricts Access- no
  • Bicyclist Impact- no
  • Transit Impact- no
  • Parking Impact- possible
  • Emergency Response Impact- no


  • makes motorists aware of the speed they are traveling and the posted speed limit
  • self enforcing where compliance is voluntary
  • highly visible
  • does not require a police officer to be present
  • passive informational tool
  • no impact on emergency services


  • cost of equipment and maintenance
  • requires towing, set-up and storage
  • possible target of vandalism
  • temporary effectiveness
  • cannot be used on narrow streets due to fire department minimums
  • may reduce number of on street parking stalls


  • must be requested for a specific area