Cancellable Pedestrian Crossing Lights

Problem: I regularly cross a road that can be busy but also sometimes has long gaps in the traffic. So I hit the button to cross, but then a gap comes along. So I cross in the gap, and would like to be able to cancel my original request to cross so as not to annoy drivers with a stop at an empty crossing. Now a simple solution would be a cancel button on the other side – and you can just see the annoying youths on the other side of the road hitting the “Cancel” button every time you press the “I’d like to cross” button.

Solution: Now we could go down the route where the lights have enough brains to cycle when there is a gap in the traffic – but that seems beyond modern technology, and anyway what I consider a gap might not be the same for a sprightly 90 year old.
We could use face recognition to track the crosser and identify when the crossing was needed or not, but its overly complicated.
So my solution is to change the standard buttons for a fingerprint scanners. This way the lights know the person cancelling is the same person who requested on the other side of the road. Obviously the lights don’t cancel the request if others have also signalled a desire to cross (unless they too ‘cancel’), and they don’t cut short a pedestrian crossing stop light sequence just because the original requestor has “cancelled” (others might also be crossing).

For those who are really paranoid, you can have the original press to cross “button” as well, so the paranoid have an alternative that will avoid any chance of Big Brother knowing there crossing use.