On May 30, 1996, three 69-metric ton triple-trailer/vehicle combinations (without drivers at the wheel) circled a 2.9 kilometer (km) test track at 65 km per hour at the Federal Highway Administration’s (FHWA’s) WesTrack facility.
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It looks here like the trailers are dumb, all the smart in the tractor with mechanical pull.
When the trailers themselves have elecrtic drive then they control their own movements, the tractor-trailer simply electrifying the trailers.
We will get this right in the next few months, and UPS as well as Fed Ex will push hard to move this foward.
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