Reducing the Environmental Load by Encouraging a Modal Shift in Commuting

H. Ueda, K. Nakazawa, and H. Takafumi (Japan)


Global Warming, CO2 emission, Modal shift, Commuting


There is an urgent need for measures to decrease CO2 emissions from Japan's transportation sector. In this study, we examined the relationship between the length of journeys to work and the mode of transport, and the potential for a modal shift in commuting. The results indicated that most people using cars to commute traveled within 20 km, and that it would probably be effective to promote a modal shift to these people. It was estimated that a modal shift by 15% of car commuters would reduce CO2 emission in Japan by 2.3-million tons a year. To improve the convenience of public transport and promote a modal shift, we propose a real-time navigation system that would automatically generate and adjust an individual's transportation mode and schedule based on their personal schedule and the current state of traffic. Information technologies such as the Semantic Web and living-body authentication may be effective in implementing a real-time navigation system.

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