Rob562
Well-Known Member
Level loading so that wheelchairs, ECVs and strollers can just slide right in without assistance really would be a great way to help with efficiency and crowd distribution.
It's my understanding that the platforms and train floors are as close as they possibly can be with the current train design. They can't be totally level.
The problem stems from how the doors hinge and lock. To unlock, they first have to drop about 1", then they swing outward. It's this drop, coupled with a little extra clearance to account for the train rocking back and forth while in the station, that keeps the platform from being raised any higher to allow for level roll-on/roll-off like a elevator.
The only change I could see would be either a platform that slid out from under the floor to become a ramp (unlikely given the space available), or hydraulic ramps built into the platform. Such a ramp would sit flush with the platform when not in use, but would raise up to meet the train at floor level. This would require the trains to hit their parking spot precisely, and also only deploy when the train doors are fully open, and conversely the train doors must stay open until the ramps are fully retracted. That would have to come after the trains are fully automated, and I guess the door controls and positions would have to be able to "talk" to the platform ramp computer.
-Rob