In Trainz: A New Era, I have traffic in Surveyor, but not in Driver. I made a custom U.S. traffic region and some of the cars I used have horns. I can hear the horns, but can't see the cars. They're invisible. At railroad crossings, I can hear the built-in horns that play when the car stops for a while, but I can't see the cars. Where are they? I'm using traffic-enabled roads and the traffic is enabled for the route.