Trainz

Hello all im trying to setup a US style grade crossing with invisible track running across a real track. So that drivable cars and semi trucks can be used on the roads and wait at crossings like the in game real road traffic can. I can`t seem to figure how to do it. I know I asked a while back on this issue. But I was never able to figure out how to get it properly working. Any tips and solutions would be very appreciated. I am very stumbled on this.