A gate apparatus for judging the entrance and exit of a vehicle, which is attached with a wireless tag that is stored with a data peculiar to the vehicle, and, on which an on-board unit having a wireless communication function is mounted. In the gate apparatus, the data peculiar to the vehicle is procured...http://www.google.com.au/patents/US6690293?utm_source=gb-gplus-sharePatent US6690293 - Gate apparatus, on-board unit, setup method of the on-board unit, toll collecting method and judging method of the entrance and exit
