In order to allow riders to provide input on future train car designs, BART has created a portable seat lab that will be taken to various community centers, events and BART stations.
Riders will get to sample a variety of seat designs and then report back on which provide the ideal height, width and legroom.
"Bigger's not always better, in fact sometimes right now we're seeing that as our ridership is growing pretty quickly that the wider seats means there's narrower aisles," BART Chief Spokesperson Linton Johnson said.
The new cars are scheduled to roll down the tracks in 2016 and 2017. However, BART still has to figure out how to pay for that fleet of the future.