They are, but with restrictions. For example, 53 ft. trailers aren't allowed without a permit.
is it legal for your load to hang over 45" on a 53' trailer
Yes you can. You can pull doubles and triples. You can pull two 48 trailers and two 53 foot trailers. You can pull three 48s, but you cannot pull three 53 foot trailers.
Yes
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57-foot trailers are legal in certain states, including Arkansas, Florida, Texas, and Mississippi. However, regulations can vary, so it's essential to check with each state's transportation department for specific rules and restrictions.
A wide variety of trailers, included 53' refrigerated trailers, are available for rent or lease at PLM trailer leasing. Their website is http://www.plmtrailer.com/
53's started coming out in the early 1980's. A lot of states did not want these on their highways at the time though. They were allowed on certain highways at certain times of the year. California was one of the more lenient states to allow these trailers. `
53' long 102" wide13'6" high
A handful of states permit 57' trailers. However, most states only permit trailers up to 53' in length.
In the five buroughs, 53' trailers are not permitted.
The 53' trailer is nothing new.. trailers of that length have been in existence since the 1950s, though were only used for special purposes. The Surface Transportation Assistance Act of 1982 was when the feds quit requiring a permit for 53' trailers, but several states fought the legislation into the mid-90s either requiring permits for 53' trailers, heavily restricting the roads they were permitted on, imposing laws on the wheelbase length of a tractor pulling a 53' trailer, or a combination. I believe it was the mid 90s when states were forced to conform to the STAA or risk losing federal highway funds.