the.com/railroad crossing

means A point where a railway track crosses a road at the same level, marked and signaled to warn drivers and pedestrians that a train may pass.

from A straightforward compound: 'railroad' (rails laid as a road for wheeled vehicles, a term that spread especially in American English, while British English favored 'railway') plus 'crossing,' simply a place where paths cross — old in English, from 'cross,' itself traced back through Old Norse and Latin 'crux.' The term rode in alongside the railroads themselves in the 1800s, when tracks began slicing through existing roads and towns had to name — and warn people about — the new hazard.