§ 393.82 Speedometer.

PART 393—PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION, last amended 2016-12-12

Each bus, truck, and truck-tractor must be equipped with a speedometer indicating vehicle speed in miles per hour and/or kilometers per hour. The speedometer must be accurate to within plus or minus 8 km/hr (5 mph) at a speed of 80 km/hr (50 mph).

Official text from the eCFR. The eCFR is an authoritative but unofficial editorial compilation; the Federal Register is the legal source.