Disclaimer: This relates to a man who usually takes the same train I do - not to a coworker. But it's the commuter rail, so it's work related, right?
Look. You have the world's worst combover. It's dead obvious, even from a distance, that you just grew some hair out on one side of your head and glued it down over your bald spot or something. A teddy bear glued to the top of your head would look less fake.
It's time to face facts. YOU'RE BALD. Get hair transplant surgery, get a toupee, or live with the male pattern baldness, but get over it - your combover isn't fooling anyone.