抄録
To prepare harbors consumes much energy and materials, so it becomes the main origin of CO2 emissions. For exact estimation of the environmental impact from goods it is necessary to assess them through life cycle from material production, construction, usage, maintenance, to demolition. Especially in case of infrastructures that life cycle is long, the stage of usage plays an important part in their life cycle. In this study CO2 emissions from transportation by a container trailer which total weight is over 10ton are investigated with real time at harbor area and highway, and the relation between fuel efficiency and traffic speed is analyzed. As a result, it is shown that fuel efficiency in case of 30.3ton is about one third compared with that in case of 10.3ton, and that fuel efficiency is improved gradually to the traffic speed of 80km per hour but hardly changes after that.
