Automatic light switch in kids' bathroom turns light on automatically. After the bathroom has been unoccupied for a few minutes, the light goes off automatically. The error of forgetting to turn off the light is eliminated. This wall mounted hair dryer has two slots on either side of the switch. The bracket on the wall has two pointed prongs that go through the two slots and turn the dryer off if the user neglected to do so.
Parking garages have low clearance.
Hitting the swinging sign or pipe will not damage the vehicle as much as driving into a concrete beam. Both the sink and the urinal are fitted with light sensors. These sensors insure that the water is turned off in the sink and that the urinal is flushed. This is an everyday example for me and many other academics, but probably not an everyday example for most people. The library at Southern Methodist University has a moving shelf system to increase the space utilization.