What speed should a dynamic brake test be performed at?

A dynamic brake test is critical for assessing the effectiveness of a vehicle's braking system while the vehicle is in motion. The appropriate speed for conducting this test is commonly set between 4 to 8 mph. This range allows for a safe yet effective evaluation of the brakes, enabling the inspector to observe the vehicle's ability to slow down or stop while minimizing risks associated with higher speeds.

At speeds above this range, the potential for more severe consequences increases if there is a brake malfunction. The testing speed of 4 to 8 mph strikes a balance between generating enough momentum to test the brakes effectively while ensuring that the inspector can manage the vehicle's safety effectively during the procedure. This is why this specific speed range is recognized as standard practice for a dynamic brake test.