Conductor
There are two answere: Time and Boo (from Mario games). Just made this joke up what do you guys think
Cross traffic doesn't stop.
Only one, given that he's koali-fied for the job.
ME: *leans in way too close* Leaving it.
He had loco motives.
Engineers (engine ears).
One trains the mind the other minds the train.
Because of the conductor.