Meeting the objectives - basic idea

My idea to meet the new set of objectives works as follows:

• Take a rough profile of a wheelchair (with user)
• Drag it through a solid block with a very short turn

The result looks something like this:



How are bikes declined access (and wheelchairs allowed):

• The passage is at its smallest at about 1.1m, which is the height of the handlebars on regular bike.
• There is a very short turn, which is very hard to impossible to take with a bike.
• It is quite narrow, so the bicyclist can't walk beside his bike, making it very hard to push it through.

How are wheelchair users accommodated:

• There's extra space provided for the wheeling action. The danger of hurting hands while passing through is hereby reduced.
• In the short turn, some extra leg space is built in. The feet of a wheelchair user make the biggest circle while turning. So by creating leg space at the bottom, the overall turning radius is kept at a minimum.
• No force has to be applied anywhere, everyone can just wheel or walk on.
• The initial profile doesn't reveal any intention towards specials efforts for the disabled or keeping bikes out.

An extra advantage is that this solution is bidirectional!