What is Crossing ?
Crossing is (noun) 1. the action of going across to the other side of an area of water How long is the crossing from England to Germany? they had a rough crossing the sea was rough when they travelled across it 2. a place where you go across safely Cars have to take care at the railway crossing. level crossing a place where a road crosses a railway line without a bridge or tunnel The level crossing gates opened when the train had passed.
source: Easier English, Student Dictionary Upper Intermediate Level