Many people with mobility disabilities also have other disabilities that may necessitate certain things to access accessible entry/exit for autonomous vehicles. (Example: a button to activate a ramp.) These include ways to access ramps or other tools that do not rely on vision, or ways that are usable and understandable by people with cognitive disabilities and/or dementia.
One thing that I have seen in my research on planning for people with disabilities is that a lot of tools that account for only one disability are often difficult to use for people who have that disability and another disability. For example, instructions for accessible versions of some tools are often not in plain language, which many people cannot understand.
I would suggest that the ways to open doors, activate ramps, and such have comprehensive design guidelines that account for common other disabilities that people with mobility disabilities may have. These include:
• Easily visible tools for people with cognitive disabilities and/or dementia - for example, large buttons with visual information;
• Plain-language instructions where necessary;
• Tools that do not rely on sight to find, for people who also have vision disabilities; and
• Some sort of sound indicator for when a ramp is moving out or in, or a door is opening or closing - like current practices on public buses.
(I also shared this as a comment during the March 10th session)