نتایج جستجو برای: air transportation
تعداد نتایج: 259345 فیلتر نتایج به سال:
Estimating the future state of air quality associated with transport policies and infrastructure investments is key to the development of meaningful transportation and planning decisions. This paper describes the design of an integrated transportation and air quality modelling framework capable of simulating traffic emissions and air pollution at a refined spatio-temporal scale. For this purpos...
Road dust and vehicle exhaust are the main sources of air pollution in cities, especially in recent years with the quantity of vehicles and transportation construction continuously soaring; the hazy weather has been a dominant urban pollution form which is widely concerned by the Chinese society. By establishing a relationship model between traffic and land use, then applying analytic hierarchy...
The most efficient size and shape of air traffic control facility airspace boundaries in the Next Generation Air Transportation System will not necessarily be the same as in past organizations of the system. As limitations of communications and surveillance technology become less important for drawing boundaries, operational efficiency will take a greater role in defining the airspace allocated...
This paper analyzes aggregate personal motor-vehicle travel within a simultaneous model of aggregate vehicle travel, fleet size, fuel efficiency, and congestion formation. We measure the impacts of driving costs on congestion, and two other well-known feedback effects affecting motor-vehicle travel: its responses to aggregate road capacity (“induced demand”) and to driving costs including those...
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