Wiktionary
common crossing
n. 1 (&lit common crossing English) 2 (context rail English) The part of a railway switch or turnout where the running-rails cross; a frog.
Usage examples of "common crossing".
Before reaching the chasm, we had crossed numerous large trails leading a little more to the westward than we had been travelling, and we were at once convinced that they all centred in a common crossing close at hand.