Eh, depends on if we go out with a bang or a whimper. I’m betting it’s going to be the latter.
If not, then it’s likely that nukes put a stop to the artilleryfest before it has a chance to really get going. And my point about there being a lot of roads in the world still stands. No military would start to target roads in any meaningful scale when they’re going to save their precious shells for the enemy.
Sure, but the roads the enemy is using are a vast minority of all the roads out there, constrained to certain geographical areas. If one happens to be in the middle of it, they’ll have bigger concerns than whether to invest in a bike or a horse.
If it’s the apocalypse, then everyone will be desperate.