UP ran a 3.5-mile long train from Dallas to Long Beach a while back. 6000-sea-cans double stacked (and nine power units).
I drove a pair of 40' and 20' containers out of the Port of Houston the other day on a 60' stretch trailer. It's impressive up close how fast those can be moved around by specialized handling machinery; on & off special trailers for local and middle distance delivery.
The trailer aero tricks are common enough now that they're the norm for big fleets that I see in Texas.
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