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U. Glaeser

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5<br />

4.5<br />

4<br />

3.5<br />

3<br />

2.5<br />

2<br />

1.5<br />

1<br />

0.5<br />

0<br />

FIGURE 38.3 Air pollution.<br />

FIGURE 38.4 Concept of ITS.<br />

Ministry of International Trade and Industry, National Police Agency, and Ministry of Construction<br />

proposed several projects on ITS and they had also promoted these projects. These are the major six<br />

projects to develop ITS in Japan, as shown in Table 38.1.<br />

VICS means vehicle information & communication system. This mainly provides traffic information<br />

such as congestion, road construction, road restriction, traffic accidents, and parking information. VICS<br />

supposes an in-vehicle navigation system is loaded in a vehicle; this is already widespread in Japan as<br />

shown later.<br />

ETC means electronic toll collection system. One often sees congestion in front of a tollgate due to<br />

“stop” and “go” at the tollgate. The aim of this project is to reduce such congestion using communication<br />

technologies between vehicle and road infrastructure.<br />

© 2002 by CRC Press LLC<br />

75 80 85 90<br />

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95<br />

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No decrease<br />

of NOx<br />

CO (ppm)<br />

NOx (x100)<br />

HC (ppmC)<br />

Gradual<br />

decrease of both<br />

CO & HC<br />

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