Road Emergency Services Communications Unit
（重定向自RESCU）
![Changeable Message Sign (CMS) on northbound Don Valley Parkway, part of the RESCU traffic management system. The CMS in Toronto are being replaced by a walk-in variation.](/Images/godic/202502/07/Don_Valley_Message_Board5833.jpg")
The Road Emergency Services Communications Unit (RESCU) is a traffic management system used by the City of Toronto on city managed highways. The system is used to monitor traffic on:
Various intersections through the GTA are also monitored including Woodbine Avenue and Steeles Avenue / Ontario Highway 404, Black Creek Drive and Lawrence Avenue West, Don Mills Road and Overlea Boulevard, and Warden Avenue and Ellesmere Road