Forum Discussion
cmeade
Dec 28, 2015Explorer
Years ago I attended a safety seminar hosted y CHP. They emphasized tire speed ratings of tires and stopping distances. To meet FMVSS standards for vehicles to be sold in the US they must meet certain braking requirements. Am probably off on the exact figures but tractor trailer at 80k lbs it must stop 55 to 0 in about 190' or less. From 65 to 0 it increased to 400' with the same combo. From 75 to 0 it increased to 850'. Something about friction coefficiency and heat. They said these figures were the reason the CA legislature would never increase the 55 mph max trailer speed limit. For those towing over 70 mph I think a minor traffic incident at 55 mph becomes a major disaster at 70+ mph. JMHO.
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