In case you haven't heard, BART will be completely replacing its fleet of cars within the next decade or so. You may have even participated in one of the Seat Labs that BART put on to get public feedback on hew seat dimensions.
BART has just released the design options by BMW Group DesignworksUSA for the public to see. Check them out at BART's website. You can see these designs presented and give feedback at any of a series of open house meetings BART has organized, or at select BART stations.
A couple of my own thoughts? While BART says "There are side panels where art from the community could be featured," it's hard to imagine it will take long for ads to appear there. It's a shame that no seats were removed to make more room for standees, luggage, and bikes. That said, however, the "party seating" in option B leaves more space open near doors, which will be good for circulation
Have a look at the designs yourself and submit your own feedback to BART.