I'd like there to be an option to have a countdown on when a red signal is expected to change. This way I can go grab a cup of coffee if I'm going to be waiting a bit or be able to detect easier a permanently red signal so I can avoid wasting time sitting at it.
If a signal is permanently red (where it shouldn't be), it is a bug. If you look at the in game map, you should be able to see why you're stopped at a red signal anyway.