Intersection Safety Cameras (ISCs) are cameras that detect the travel speed of vehicular traffic. The ISC is also able to detect whether a vehicle fails to stop for the red light phase in a signalized intersection. ISCs are deployed at signalized intersections throughout the city with high collision rates and a history of serious injury or fatal collisions.
More information on this is available at:
http://www.calgary.ca/cps/Pages/Traffic/Speed-on-green-and-red-light-cameras.aspx
