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A service brake systemA parking brake systemAn emergency brake system
Interstate transportation: Surge brakes are allowed on any trailer with a gross vehicle weight rating (GVWR) of 12,000 lbs. or less, when its GVWR does not exceed 1.75 times the GVWR of the towing vehicle; or any trailer with a GVWR of more than 12,000 lbs. but less than 20,001 lbs. when its GVWR does not exceed 1.25 times the GVWR of the towing vehicle. See section 393.48 of the FMCSR.Intrastate transportation: Surge brakes are allowed on any trailer when the combination has a GVWR of not more than 26,000 lbs. AND the actual Gross Vehicle Weight (GVW) or GVWR of the trailer is 15,000 lbs. or less. Vehicles of any size that are transporting hazardous materials in an amount that requires placarding or vehicles that are designed to transport more than 8 passengers, including the driver, are prohibited from being equipped with surge brakes in intrastate commerce.
Monday - Friday, 8 a.m.-5 p.m.