You may have responded before seeing the rest of my comment edit - there are many methods for crossing some bridged area.
Either way, we can always just... scout a route ahead of time which doesn't take us straight to a dead-end. We probably already do this with satellites in a matter of minutes or hours nowadays.
It's... obviously better to just trust the roads are good to go, but you can never trust that in enemy territory. Even if the bridge is "sufficiently strong", you don't know if it was booby-trapped by the enemy.
Either way, we can always just... scout a route ahead of time which doesn't take us straight to a dead-end. We probably already do this with satellites in a matter of minutes or hours nowadays.