Re: Mansfield bars
"I'm pretty sure that there are engineers in the USA that could solve the problem of the side protection bars on trucks grounding on rail crossings." --- werdsmith
Even hinged bars that could be manually swung up for crossing large humps would do the trick. The use of Mansfield bars is much wider than might be expected --- in multiple collisions vehicles can be pinged in all sorts of trajectories: it's usually better for nobody to end up underneath trailers.