Caltrain isn't completely immune to public transit foibles, but it's mostly hazard-free, primarily because people use it exclusively as transportation and not "

Caltrain isn't completely immune to public transit foibles, but it's mostly hazard-free, primarily because people use it exclusively as transportation and not "a place to hang out outside of the elements". Fare evasion is actually checked for regularly, and it's enforced. I always take Caltrain when I go directly to/from the ballpark, even though I have parking passes for all games (which almost always can be sold at a profit).