The "slow-moving vehicle" sign is an orange triangle with a red border. It alerts other drivers that the vehicle ahead will be travelling at 40 km/h or less. When on the road, farm tractors, farm implements/machinery, and vehicles incapable of sustaining speeds over 40 km/h must display the slow-moving vehicle sign. Watch for these slow-moving vehicles and reduce your speed as necessary.

EDR signs are used during the unscheduled closure of a provincial highway when OPP detour all traffic off the highway. The EDR markers are located along alternative routes and provide direction to motorists around the closure and back onto the highway.

This placard indicates a long commercial vehicle (LCV), a double trailer up to 40 metres long. It is essential to recognize an LCV on the highway based on its rear signage and anticipate its extended length and limited speed when preparing to pass one.