In one of the few cases where a vehicle capability is made illegal, Virginia outlawed the use of freewheeling after accidents where brakes failed coming down the US routes that go over the appalachian mountains. US 50 and US 33 are two of the routes and I can tell you from firsthand experience that they can get pretty hairy in a new car, much less non power assisted 4 wheel drum brakes where the fluid could reach boiling point. It is my understanding that the freewheeling could not be disengaged while the car was moving.
The hilarious thing is I don't think the law was ever repealed, so technically a Prius is illegal to operate on those same roads, by the strictest interpretation of the law, which will never happen.
regards
Mech
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