Development of Ramp Metering Using Fuzzy Logic Control Algorithm on Freeway

Abstract

Ramp metering can effect on mitigating the traffic congestion on freeway. In Taiwan, the conventional Local Traffic Responsive (LTR) ramp metering model based on the capacity and demand algorithm has been adopted for freeway ramp control since long time. For enhancing the ramp metering technology, this paper aimed at developing a new Fuzzy Logic Control (FLC) algorithm based on the real traffic situation for ramp metering control on the highway tunnel, by taking Freeway No.5 as the case, which is a freeway with the longest tunnel of 12.9km, in order to enhance the ramp metering performance on relieving traffic congestion. Through the comparative analysis using microscopic simulation, the FLC ramp metering results in higher performance on mitigating the congestion than the LTR control and no control.