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| Effects of accelerated development of urban rail transit in Shanghai before the World Expo on greenhouse gas emission reduction |
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Abstract To clarify the effects of accelerated development of Shanghai’s urban rail transit since 2007 on GHG emission reduction, based on analysis of the annual changes of traffic modes and GHG emissions further comparison was made between the real scenario (accelerated development of rail transit) and the Business-As-Usual scenario (normal development of rail transit). The results showed that the rail transit absorbed 50% of the total increment of commuting volume since 2007, which (1) helped to relieve the stress of congestion and pollution related to car growth, (2) slowed down the growth rate of GHG emissions from Shanghai’s commuting system even though the traffic volume was growing rapidly at the same time. In the real scenario, the total GHG emissions (CO2-e) from inside-city commuting from the beginning of 2007 to the end of October, 2010 was 789,000 tons lower than those in the BAU scenario. This not only made great contribution to Shanghai Expo to offset part of its GHG emissions before closing and to achieve its Low-Carbon Expo target, but also piloted in Shanghai’s transformation toward a low-carbon city.
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Received: 20 September 2011
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