Who needs a speed limiter?

A speed limiter, sometimes called a governor, is a built-in microchip that allows a truck engine’s top speed to be preset. Ontario and Quebec regulations ensure that all large trucks operate at a safe speed, capped at 105 km/hour. This will reduce highway collisions related to tailgating and improper lane changes. It also has major environmental advantages through the conservation of fuel. Fuel savings of up to 10,500 litres of diesel fuel per year for a typical tractor-trailer unit — or 50 million litres in total for all such trucks in Ontario.*

Speed limiter requirements will apply to vehicles that were manufactured in 1995 or newer with a manufacturer’s Gross Vehicle Wight (GVW) rating of 11,794 kilograms (26,000 lbs) or more. Only commercial motor vehicles with an electronically controlled engine are subject to these regulatory requirements.

The speed limiting system of these commercial motor vehicles shall be properly set to no more than 105km/h or 65 mph. Speed limiters do not restrict engine RPM or horsepower needed to pull a load. Buses, mobile cranes, mobile homes, ambulances, cardiac arrest emergency vehicles and fire apparatuses will be exempt from the regulation.

*Estimated fuel and greenhouse gas savings are based on a tractor-trailer running 125,000 miles per year.

Source: Ontario Ministry of Transportation