Caltrain doesn't have turnstiles, it's walk on, walk off. It's similar to Amtrak. You buy your ticket ahead of time (or pay on Clipper) and show it to a conduct

Caltrain doesn't have turnstiles, it's walk on, walk off. It's similar to Amtrak. You buy your ticket ahead of time (or pay on Clipper) and show it to a conductor on the train.