抄録
Ramp metering has been proved to be an effective measure of relieving freeway congestion, and it also owns many other benefits such as reducing total vehicle travel time, reducing automobile emissions and so on. This paper tries to develop one ramp metering algorithm which could also take emissions reduction into account. The algorithm occupies two objectives, the primary is to minimize total vehicle travel time, and the secondary is to reduce ramp emissions as much as possible. According to the statistical analysis result, this paper gets some conclusions that the density based ramp metering algorithm is effective in reducing the total vehicle travel time and could reduce on-ramp emissions and queues a lot more than ALINEA strategy. Especially, on large uphill gradient condition density based algorithm could reduce the total emissions much more than ALINEA algorithm.
