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The only braking thing I've ever heard of regarding regulations refers to the commercial class tractors and it is set at X number of feet when loaded from a specific speed and only applies to current years production for that reg. A manufacturer's requirement only as there is no safe way to test this anyway without seriously damaging equipment. I believe the test tractor submitted to an agency for testing has to stop within a specific distance, fully loaded, 4 out of six tries.
Old: Full GVWR from 60mph in 355 feet
New: commencing in part by 2011 - Full GVWR from 60 mph in 250 feet.
There is much more to these rules but that is the basic heart of them.
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Sandra, Bruce
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