[openrailwaymap] Extract kilometration from map?

Hello, for the purpose of calculating average speed on streetcar routes by section, I need to extract the kilometration of the lines, including stops of course. What I do not mean is to take a tool à la Google Earth's "path" tool and re-trace the routes myself, since the vector paths are *already* in the map. Is there any way to do this? TIA, Sincerely, Wolfgang