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以机动车在匝道上的行驶速度为纽带,通过建立车速与匝道长度、机动车污染排放与车速之间的关系,推导出了机动车污染排放与匝道长度的关系,利用积分的方法对匝道变速运动段机动车污染排放进行了计算,提出了基于几何线形的道路立交处机动车污染排放计算方法,并通过算例进行了验证。结果表明:该方法能够将机动车污染排放和道路立交几何线形联系起来对机动车污染排放进行计算,根据道路立交几何线形设计文件就可以计算出立交投入使用后的机动车污染排放总量。
Taking the speed of motor vehicle on the ramp as a link, this paper deduces the relationship between vehicle emissions and ramp length by establishing the relationship between vehicle speed and ramp length, vehicle emissions and vehicle speed. Using integral method, The calculation of vehicle emissions from the sport segment was carried out. The calculation method of vehicle emissions from road intersections based on geometrical lines was proposed and validated by an example. The results show that this method can calculate the vehicle pollution emissions by linking the pollution emission of motor vehicles with the geometric alignment of road interchanges and calculate the total vehicle emissions after the interchanges are put into service according to the geometric alignment design documents of road interchanges.