Nutloose,
I was told they had removable bridges as well
But if you think that we were able to use the Esso Garage in Elmpt as a mini engine bay, then anything was possible in those days.
As for runways being used as roads there is a fab one in Cyprus somewhere between Larnaca and Nicosia/Troodos. We were on a coach trip and the tour guide asked if anybody could work why the road was so straight and why there were piano key markings. I was that smart arse that guessed "runway" and got it right