Resident Travel Modes and CO_2 Emissions by Traffic in Shanghai City

This paper discusses the influence and characteristics of different resident travel modes on urban CO_2 emission by urban traffic in Shanghai from 2002 to 2006,using the calculation methods adopted by the IPCC.The results showed that CO_2 emissions due to urban traffic increased significantly with time.CO_2 emissions from private cars increased fastest,and were almost equal to the sum of CO_2 emission from three types of public transportation modes in 2006.Among the public transportation modes,taxis showed the highest annual CO_2 emissions and CO_2 emission per capita.Railways showed the lowest.The proportion of CO_2 emissions from buses and taxis decreased,while that from the railways increased.The changes in the CO_2 emission structure of the three kinds of public transportation modes were beneficial to the reduction of CO_2 emissions.Popularizing railways,limiting the number of private cars,proper design of road networks,economical vehicle speed and changing fuel type are important measures for reducing CO_2 emissions.Among them,limiting the number of private cars is the key measure to the carbon emission reduction.