That didn't work so well as a station crossing, so I ended up with this design instead.
It uses the bottom left rail signal to close the gate for the player, either using yellow (reserved stretch of track) or red. The upper left rail signal is used to close the track to any chain signals on the right of the crossing. (No chain signals included since that is part of whatever turn design you use for the train to enter the single track station.)
Blueprint Stringhttps://drive.google.com/file/d/0B6YHoo ... sp=sharing