I’m unable to achieve the gold medal score for this scenario. The best achievement score is 2,060 and that’s scoring 500 on stopping markers. I’m not sure it’s related to it not being able to finish the scenario without saving and exiting then loading it up due to drivers brake not being able to be set to shutdown as the last cab instruction.
The scenario will finish if you put the brakes in full service rather than shutdown. The reason it's impossible to achieve gold is that it's been set up so that gold = 2200 points, and you can only score 2060.