Interesting; thank you. It looks like the federal limit in the US is 40 tons; some states are higher and others are lower. EU appears to mostly limit to 44 tons

Interesting; thank you. It looks like the federal limit in the US is 40 tons; some states are higher and others are lower. EU appears to mostly limit to 44 tons. Extensive freight rail in the US precludes much of the need for special high-tonnage routes, though you’ll see unusual items transported on trailers with extra axles from time to time.