Working Greenbriar Turn Part 2 running downhill into Delano Track 2, there was an opposing train waiting on Track 1. I switched to rear view so I could watch it pull off and noticed that it got a proceed signal and started to move before the rear of my train was in clear. Luckily I was going fast enough to avoid a collision but it looks like the clearing and activation points for the virtual track circuits need to be amended. This is on PC but probably across all platforms.