When oversimplifying, road transport went from this:
To this:
And it doesn't really get any bigger, because it tends to get totally impractical after this 50-wheeler truck.
Just like German Panzerkampfwagen VIII Maus (188 tons) from 1941 or German Panzerkampfwagen E-100 (123 tons) from 1943 were highly impractical. Panzer VIII Königstiger (68.5 tons) from 1943 was the practical maximum and Abrams or Merkava Mk 4 tanks weight about as much. It's not a coincidence that tanks haven't got heavier in the last 81 years.
