naturist wrote:
In Virginia, brakes are required by law if the towed vehicle (car plus dolly, in this case) exceeds 3500 lbs. Some other states, it is 3,000 lbs. If you fancy travelling outside VA, I'd go with the lower number.
Actually, in MOST states braking on a towed motor vehicle is not required by law. The 1500 lb or 3000 lb. figures are for trailers, and a towed motor vehicle does not, in many states, match the legal definition of a "trailer". One of the key provisions in the laws defining a "trailer" is "designed to be towed by another vehicle", which a motor vehicle certainly is not. That definition is also in the FMVSS.
Many states, including Montana and California, have a "Braking Performance Law" which defines how fast you must be able to stop on a clean dry hard level surface from 20 MPH. In Montana that law is MCA 61-9-312. FMVSS also has that standard.
FMVSS: Federal Motor Vehicle Safety Standards
Also, keep in mind that in states where the limit for trailers is 1500 lbs, that usually means 1500 lbs UNLADEN weight. When the braking limit is 3000 lbs or higher, it usually means GROSS or loaded weight (GVW or GVWR)
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