Yes they will have little extendable bridge things built inAmtrak needs that on THEIR train doors. There are very BIG gaps between THEIR doorways & the platforms!!! I hope that the new Acela trains will have them!!
I wonder why no train system has tried the ramp that flips out every time, rather than a ramp that extends out.Any automation on the door lips is going to be subject to these variances in air ballast pressure. If the ballast pressure is high (i.e. door raised above platform) they'll be fine. But it won't work if the car slips slightly below the platform level and the auto bridge plate bangs into the platform edge...something that is most likely to happen on very cold mornings or soon after a cold start. You still need the manual traps at every station to back everything up, though if this works even 30-40% of the time it's enough of a time-saver to have done its job. No...there isn't really anything that can be done about it. Most HRT systems in cities with large temperature swings have to put up with some degree of air ballast variance, so regardless of what % of their trips hit absolute level perfection they all have to bake in operational allowances for variance.
As long as the car is taller than the platform, it works, every time.
Only places Ive seen it is on BRT buses
You can see on the front door which didnt "dock", the bridge it outside the doors. The large size of the ramp means it needs to be less exact. They deploy every single time, so no need for driver assistance.