In all my time in RW/TS, I have only completed ONE (1) scenario, and that was a point A to point B with no switching. However I didn't get credit for it because of speeding, too horny, moving while loading passengers, etc.
Somehow once a scenario indicates I need to go to track xxyy and so on - Fail. I have never figured out how to determine which track is what.
Apparently, I need to keep painting and forget about running.