buried in a consultation for changes to the Traffic Signs Regulations and General Directions is the nugget that in the 2014/15 reporting year there were over 1600 instances of road vehicles hitting rail over-bridges. That's an average of more than four a day- this seems quite a lot! Especially given that most taller vehicles are driven by supposed professionals. It strikes me that if a serious safety failing was occurring multiple times a day on the railway itself there would be huge industry efforts made to stamp it out. Yet, as with most road safety issues (something like three pedestrians hit by London buses every day, for example) there seems to be a bit of a "well, what do you expect?" attitude.