@dtshaw1 Yeah that definitely shouldn't be happening. We'd need to take a look at the save game - it's possible that there's just an odd street setup that's not working too well with the AI - but it could also be an unknown rare bug!
@Deep Blue - there are issues with Advanced Vehicle Options, and IPT2 should be fixed but there could be some things still causing problems. Any mod that's affecting transit vehicles is a high suspect for conflict right now since we added a Bus Line Customization tool to the base game