Speed Limit Observation and Warning System

The City has acquired new, high-tech Speed Limit Observation and Warning System (SLOWS) trailers in response to Calgarians' concerns about the potential for speed-related collisions in residential communities.

SLOWS are stand-alone, radar-equipped devices that display the speed of oncoming vehicles. Unlike hand-held radar units, they do not require continuous hands-on operation by city staff/community volunteers.

The SLOWS program:

  • Enhances traffic safety by educating motorists about how fast they are going and encouraging self-correction. 
  • Conveys community concern about speeding.
  • Balances enforcement activities with an educational component.
  • Allows community associations and citizens to take a proactive approach to traffic safety by enabling them to request the placement of a Speed Awareness trailer in an area of their community where speed is a concern.

SLOWS can also be used to increase driver awareness about the importance of speed limit compliance in construction zones.

SLOWS are durable, easy to move from one place to another and technologically advanced (features include: on-site keypad and remote programming, a built-in solar regulator, a 50-watt solar panel and an alarm system to prevent vandalism).

A SLOWS trailer can display a motorist's speed, custom messaging, and are easy to maintain.

How to request a SLOWS trailer?

Citizens can request the placement of a SLOWS trailer in an area where speeding is a concern by filling out the online service request below.

Request a Speed Trailer Sign

Related information

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