Pedestrians who can’t see or can’t reach the pedestrian control button at traffic lights might not need to worry any more. In Edinburgh the problem has been solved with an app. No special cards (as in Hong Kong) needed to activate the pedestrian signal. And no special adaptations to the signal system either. The BBC Youtube video with captions explains how. The technology can also be used for finding the reception desk in large buildings with large open spaces. No doubt there will be other applications yet to be thought of.
Note: In the UK, people with disability prefer to be called “disabled people”.