Not entirely sure how much energy this saves, but people going up and down even one floor have to use elevators in our building. Stairwells should be easy enough to secure using badge access (that's all that secure the elevators..) - why force everyone to use the elevators? Like many folks I'd probably use the stairs more often than not. The elevators would get used less, saving the government money, it would allow me to get up or down a floor quicker, and I'd get some exercise in the process!
Idea No. 5423