But how would that make him "king of the road"?
Come to think of it, has Flanaia1 driven that Cat on the road? Methinks there may be a bit of rule-bending going on in order to claim oneupmanship...
The OP did state in the very first post "what is the largest and heaviest vehicle you have ever driven on or off the Queens highway"
While the handful of steam trains I've driven might not be as heavy as Ian's truck , they were longer and could therefore , arguably , have been larger .
I used to do a lot of photography and video work for a preserved railway and have briefly taken the controls of a few locos , a couple of times whilst hauling trains behind .