Not a call for help and I cannot claim it as a creation, this just happened:
This recalled a distant memory when a London Double Decker Bus was diverted off route and the Driver did not notice a Low Bridge!
In the space of 20M he managed to convert the Double Decker into a Single Dcker, fortunately he was the only one on board at the time:
Did I hear that Driver say “Please Mr S3D can you put a Sign on your Low bridge” 
In case it has some use:
Interesting? Or?.shapr (320 KB)