I'd definitely leave the trace, unless Steve asks otherwise. If nothing else it might be presented to the beak to show the enormity of what happened.
WRT cycling with one leg, lots have done it even when they weren't one-legged cyclists. A chum did 150 km that way after his left crank broke. But Steve would not only have a leg that couldn't drive, he'd have to cater for the dead weight of the cast. I had a hell of a time getting on the turbo when I had my ankle in a fibreglass boot, and in plaster it was impossible. OTOH I hadn't had plate & screws, just immobilization for a cracked talus bone.