Cancelling Elevators: Part II

I am still formulating an efficient solution to the elevator issue from the previous draft, but I will share my thought process, and the solution I am exploring.

Summary of Problem:
People call-up / request each Elevator Car to their lobby. When the first car arrives, the person enters. But the other cars eventually arrive, often with passengers who are delayed for the unnecessary stop. We are seeking a way to Cancel the Call to Cars when request is already filled; no need for the other cars to arrive.

Line of Thought:

1. Passengers will not go out of their way to cancel without being rewarded.
2. If a cancel button or toggle off switch existed on each request button, then customers would have to go out their way to cancel, because 'their way' is towards the first arriving car.
3. Our system is not set up to provide rewards to passengers.
4. If system will not give rewards, and passengers will not go out of way, then cancel mechanism must not require an action of the passenger that takes him of his way.
5. Cancel button/toggler cannot be on the wall, next to door, as the request buttons are.
6. If a cancel button/toggler need not be on the wall, then neither do the request buttons need to be on the wall.
So, the solution to the Cancel mechanism could be a solution that also provides for requests. We can reword our need to incorporate that.... : "Call and Cancel Mechanism."
7* One solution is to provide a 'remote' clicker to each building member. The clicker would be used to request and cancel the cars.
- The clicker :
A. Requires extra equipment to be maintained by users.
B. Does not provide for non-members.

8. The clicker is not a good solution.

9. One of the reasons the clicker is a bad idea, is because the passengers must do actions that are not related to the core activity of traveling up or down the building.
10. The remote would have buttons, and the remote adds extra activity; the wall buttons are buttons, so it could be that all buttons are unnecessary.
11. An ideal solution would require minimal action of passenger. The status should be a byproduct of their single, true desire (up or down) rather than require any further input than the statement of the single, true desire.

**** At this point, I am studying the feasibility of a Floor Mat, with alternate colors for "Down" and "Up." A car moving in the direction X will arrive at a floor if at least one Foot is atop a floor section for X....

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I am heading to Ireland for a week. I will resume this exercise later...