This is happening in London although with ground based rather then air based sensors. http://www.westminster.gov.uk/services/transportandstreets/parking/bay-sen

This is happening in London although with ground based rather then air based sensors. http://www.westminster.gov.uk/services/transportandstreets/parking/bay-sensor-technology/ http://www.westminster.gov.uk/services/transportandstreets/p...