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You got the units wrong - 72.000 lbs is ~32 metric tons. Assuming carriages with two separate axle pairs that's 8 tons per axle, if two adjacent carriages share one axle pair a 4-carriage train has 5 pairs / 10 axles in total for a load of 128 tons it's 12.8 tons/axle.

Still, neither is something to take lightly (pun not intended), and I guess that building elevated makes construction a good chunk more expensive.

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Whoops, missed a zero when putting it into google perhaps.

Here's the Hitachi Rail page with the trains, looks like four per car. http://italy.hitachirail.com/en/honolulu_381.html

So at 8 tons per axle its still within OP's truck limit.

Anyway I'm just kvetching because our 20-mile light rail is taking 22-years to build, is half complete, and a billion dollars over budget (as of now).

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