Truck Parts and Service

August 2014

Truck Parts and Service | Heavy Duty Trucking, Aftermarket, Service Info

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Page 28 of 45

27 I t's been nearly fi ve years since the National Highway Traffi c Safety Administration (NHTSA) pub- lished its fi nal ruling updating Federal Motor Vehicle Safety Standard 121 – Air Brake Systems, and re-introduced commercial trucking to reduced stop- ping distance (RSD). Written with compliance dates in 2011 and 2013, the 2009 ruling forced OEMs and brake manufacturers to reduce emergency stopping distances for their new tractors by an astonishing 30 percent. Though it wasn't easy, OEMs even- tually succeeded in meeting the regula- tions, and RSD technology is standard on all new heavy-duty trucks. But now, as the fi rst RSD compliant trucks begin to enter the aftermarket, the technology faces its next challenge — adoption. Because FMVSS 121 only requires new tractors to meet RSD regulations, vehicle owners don't have to accept the technology in the aftermarket. But with clear safety and perfor- mance benefi ts, brake suppliers say the lack of an aftermarket regulation W W W . T R U C K P A R T S A N D S E R V I C E . C O M A u g u s t 2 0 1 4 | T R U C K P A R T S & S E R V I C E By Lucas Deal, Editor Service Bay A new stop option How NHTSA's reduced stopping distance mandate has impacted the aftermarket

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