I get stuck after parking the train in the middle of the turntable, correctly aligned in the right direction. I can't leave the seat to go to the turntable control cabin for the next step. Tried everything I can think of including not sitting down to begin with (controls move but no effect).
Might be a bug? The game should let you get out of the chair whenever you press E. When you park on the turntable in the Clear Cut scenario, the game asks you to put the Independent Brake in Release. Sometimes it doesn't always recognise you've done this immediately, so try putting it into Bail Off and back into release a couple of times to make sure the game has passed this step. If not, I'd suggest posting a bug report.
Might be worth dropping our support team a call at dovetailgames.kayako.com and they look into this and do what they can to help - Jay