I missed timed parking the Shimms-U into the yard and they ended up too close to the switch. Plus the yard is guarded by signals. Now I'm stuck!! I don't think this has ever happened to me lol.
I've once put an AI into a similar situation on Penn Corr and he just went through no problem, completely ignored collision and was happy about his day.
When you hit escape, isn't there an option to return to your last waypoint? But I don't know if it make sence in this situation.
Fortunately, there is a quick and easy solution to the situation you got yourself into: ESC followed by a restart. Sure. it's embarrassing, but no one else will know if you don't post about ... oh! ... well, you already did that. Anyway, you can have the pleasure of trying again from the beginning -- and this time you'll know better.