it's, in fact, a swiss manufacturer stadler has a vehicle akin to this. you envision the two sets of doors that you see there, potentially one at 48 -- 50" and the other at 25", having dual-boarding on a vehicle like, this which is bilevel. and can provide manufacture of the capacity that caltrain requires in order to maximize their vehicle capacity. in the dual-boarding configuration and because of the opportunity to have dual-doors, it provides that transitional opportunity as supervisor kim you had asked the question about how you evolve from 25 to 50? at a single-level electric multiple unit you don't have stairs from 50 inches. whereas at 25" you have stairs to get up inside the vehicle. there is no vehicle that provides a drop of stairs on the vehicle side that. is the difference that you really don't have that vehicle side option. you have to provide that improvement on the platform side. whereas with 25 inch, caltrain could continue to use the existing platforms that they have today in much the same way that you board a gallery car today. you woul