250 Takayoshi Yokota and Dai Tamagawa
between an in-vehicle device mounted onto the vehicle and an antenna
at the toll gate, and cars can pass through without stopping. In ETC
systems in Japan, an IC card that identies the individual attribute of
users is needed, and the card must be inserted in the in-vehicle device
when using ETC. Now, the ETC system is used in many countries around
the world, but the structures vary among countries or even areas in the
same country.
ETC toll gates can handle several times more cars than non-ETC toll
gates; thus, trafc jams would be reduced as ETC came into wider use.
Now, in Japan, it is possible to use ETC at almost all motorways and the
rate of using ETC at the toll gate has reached over 80% (as of July ...