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Is 12 yards as long as a Semitrailer?

It's about three-fourths as long as a Semitrailer
The length of a Semitrailer is about 16 yards.
(a.k.a. semi-trailer truck, a.k.a. semi, a.k.a. tractor-trailer, a.k.a. truck and trailer, a.k.a. eighteen-wheeler, a.k.a. big rig, a.k.a. Mack truck, a.k.a. transport, a.k.a. lorry, a.k.a. artic; for box truck; United States Federal length limits)
According to the United States Department of Transportation (DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 16 yards (unless superseded by state law). These regulations also allow the vehicles to tow up to 36,000 kg in gross weight.
There's more! See other comparisons to 12 yards...