There is a CPUC rule that makes level boarding difficult (even if they did say ADA preempts its, TAs are still afraid to implement it). The main impediment is that Caltrain doesn't really seem to think it's important given the bare bones staff they assigned to the study and the epochal timeline.

No longer accurate. See: caltrain-hsr.blogspot.com/2024/03/leve... I am not a CPUC expert but this ruling seems fairly expansive.

Level Boarding is Legal in California

Arrow level boarding platforms at San Bernardino, CA Comments to old posts on this blog are stored in a moderation queue that your author do...