Brian, I can see your concerns, however cant see what the appropriate rectification would be. Any suggestions?

The whole idea was to allow wheeled things such as buggies and wheel chairs, to pass across swiftly, and not be left at a kerb, stranded in the path of a car.

This has clearly been successful, but now do I understand you are concerned that a car will now choose to drive diagonally across the centre island?

I am a strong believer that there is no such thing as perfection, but given the objectives here, I would say its been a very successful compromise.