Great use of technology to eliminate one of life's annoyances.
On a recent trip to Quito Ecuador one of the shopping mall garages had signs that told you where there are empty parking spaces so you do not have to drive around. The sign had numbers of free spaces in that direction. Each parking space has a sensor above to give real-time info. Each space also has a light (red or green) to give you the status you can see from afar.
Greatly reduces garage traffic. Very smart.