A method for collecting tolls on a high occupancy toll lane includes detecting a number of driver's licenses inserted into a card reader located in a vehicle and transmitting the number of driver's licenses to a roadside transceiver for a determination of a toll amount for the vehicle based on the number...http://www.google.com.tw/patents/US7091880?utm_source=gb-gplus-share專利 US7091880 - Licensed driver detection for high occupancy toll lane qualification
