Test Service Brake Stopping Action Go about five miles per hour. Push brake pedal firmly "Pulling" to one side or the other can mean brake trouble. Any unusual brake pedal "feel" or delayed stopping action can mean trouble. If you find anything unsafe during the Vehicle inspection, get it fixed. Federal and state laws forbid operating an unsafe vehicle. 2.1.6 – Inspection during a Trip Check Vehicle Operation Regularly You should check Instruments. Air pressure gauge (if you have air brakes. Temperature gauges. Pressure gauges. Ammeter/voltmeter. Mirrors. Tires. Cargo, cargo covers. Lights. Etc. If you see, hear, smell, or feel anything that might mean trouble, check it out.