what if this was after TSHTF?

[Devonian]

Maybe one of the wiser members could explain to this Chartered Civil Engineer, why this bridge:

https://www.google.co.uk/maps/place/Two+...d171?hl=en

or this road:

https://www.google.co.uk/maps/@50.572970...!2e0?hl=en

or any other bridge or road would suddenly vanish within a few years after any kind of SHTF event was to happen. Afterall these roads and bridges have been there for 100's of years, they are not maintained, they are not heavily trafficked, they do not have drainage etc....

They are also regularly subjected to severe floods and freezing temperatures, some of the worst weather that the UK experiences etc etc

All I'm trying to do here, is show that maybe things will not happen in the way that you think they will......