>>890131Well you are the German here, I don't know if it's just a pure guideline or a binding regulation of varying strenght.
2650 mm is an EU limit for rail vehicles that can be simultaneously regarded as road vehicles as well. I don't know how street running trains are treated in places where it happens regularly; just wider lanes?
2650 mm seems like a German thing, adopted as EU wide standard from there. Can some German guy give enlightened guesses on which was the seminal reason that dictated this limit?
Was it:
- Adopted from the wides cars in street use at the time? (If so, where?)
- Calculated as the widest allowable and Stadbahns swell into that width after the fact?
- Calculated as the widest allowable, some systems actually had to adopt narrower rolling stock. (Old units naturally enjoying some sort of grandfather clause.)
As far as I know, most systems had adopted width of about 2300mm after the war, some were 2500mm. I don't know where this 2650mm thing started.
