This proposal wants to establish the keys wheelchair:portable_ramp=* and wheelchair:portable_lift=* to be placed on public transport platforms to indicate whether a portable ramp or a portable wheelchair lift is present at the platform. It also wants to establish the subtags about dimensions and load capacity to give further information about the physical conditions under which these devices can be used.
These tags should be placed on the element that represents the platform, e.g. public_transport=platform for a PTv2 platform.
Not seen here at all. Some buses actually have an extendable ramp at the rear side entry which slides out the bus floor which combines with elevated bus stop platform of which there are more and more, all those I’ve seen here have tactile paving. There’s also ‘social services’ mini buses with lift that are on call… say where you are and where you need to go, within limits of course.
In short the wheelchair:portable is part of the vehicle and meshes with the raised platforms.
BTW, buses that lower the suspension at platforms side is also seen. Makes it easy for those to board with pram and wheelchairs of course.