Matsushita Electric Industrial Co., Ltd.

Koji Nishikigi

Seiji Fuyama

Shigeki Kaneko

Shinichiro Kawasaki

Kazuhiro Morisaki

Hirokazu Wada

Takao Ogawa

Kenji Yaegashi

An ETC (electronic toll collection) system includes an antenna having a predetermined directivity for providing a limited radio-communication service zone. A vehicle sensor operates for detecting a vehicle which reaches a predetermined position in the limited radio-communication service zone. A radio signal is transmitted via the antenna. A decision is made as to whether or not a radio response to the radio signal is received via the antenna. In cases where a radio response to the radio signal is received, it is judged that there is an ETC vehicle incoming. In cases where the vehicle sensor detects a vehicle while a radio response to the radio signal is not received, it is judged that there is a non-ETC vehicle incoming.

Electronic toll collection system for toll road

Growing community of inventors

Kawasaki, Japan

Koji Nishikigi