1. Automobile Inspection & Registration Information Association Transition table on automobiles possessed 2013
2. Ministry of Land, Infrastructure, Transport and Tourism National road, street traffic situation investigation report 2010
3. Traffic engineering;Kawakami;Morikita Publishing;,2004
4. Takada K CO 2 and traffic 2000 23 49
5. Driving skills to avoid a traffic delay on highways;Nishinari;Getsukan Koutsuu,2009