School Bus Parking Brake Interlock Retrofitting

School Bus Parking Brake Interlock Retrofitting


(Key in ignition and engine starting) It’s called a parking brake interlock feature. It was introduced in 2010 at the National Congress of School Bus Specifications. And what it does is the driver has to sit in the seat and push the brake pedal with their foot before the parking brake valve can be released. If they’re not in the driver seat or and depressing the brake pedal, the air valve will not release and it will not release the parking brake. So it can’t roll unless somebody’s in the driver’s seat. With this feature it won’t happen. Nationally it is recommended in 2010 that this should be on all school buses after that. Now the national specifications aren’t a mandate, they’re a recommendation. But when we introduced it in 2011 into our Virginia school bus specifications it was mandated after that point in 2011 that all school buses should have it on. Every one from the state superintendent all the way down through the transportation departments at school divisions to bus drivers are aware of this now so there will be extra attention with the operation of the school bus without the parking brake interlock until it’s added. The vendors are working diligently to get the parts and we’ll be out right away to correct this. Luckily we’re at the end, towards the end of the school year so the majority of these buses are going to be completed this summer without the buses being used at all so we sort of caught this at an opportune time.

About the Author: Michael Flood

Leave a Reply

Your email address will not be published. Required fields are marked *