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A new truck’s brakes must pass two legal requirements as defined by Federal Motor Carrier Safety Standard No. 121 — a brake dynamometer certification and a full-vehicle stopping-distance test.
Phase one of the Reduced Stopping Distance (RSD) mandate took effect in August 2011 for new three-axle tractors with Gross Vehicle Weight Ratings (GVWRs) up to 59,600 lbs. Phase two of the mandate ...
Annie Winterburn, who works for Spot On Driving, has shared her top tips on how to stop tailgaters without having to brake - ...
Two-axle tractors and tractors with a GVWR above 59,600 lbs will have to meet the reduced stopping distance requirements by August 1, 2013. NHTSA has noted that fleets may elect to comply with the ...
Meritor says that its portfolio of Meritor Q Plus S-Cam drum brakes are fully compliant with the U.S. government’s FMVSS 121 mandate for reduced stopping distance requirements, which takes ...
Phase 1 of Safety Standard 121 required a 30% reduction in stopping distance for new 3-axle tractors with a GVWR up to 59,600 pounds produced after Aug. 1, 2011.
The old standard required a complete stop within 355 feet. For a small number of very heavy, severe service tractors, the new stopping distance requirement will be 310 feet at the same speed and load.
The increasing adoption of Antilock Braking Systems (ABS) has focussed attention on the stopping distances which can be achieved with such systems. At the same time, the efforts to "harmonize" the ...