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Is 4 rods as long as a Semitrailer?

It's about one-and-two-fifths times as long as a Semitrailer
The length of a Semitrailer is about 2.9090 rods.
(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(DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 2.9090 rods (unless superseded by state law).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 4 rods...