کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
525460 | 868921 | 2012 | 18 صفحه PDF | دانلود رایگان |
This paper investigates the efficiency and equity of morning peak ramp control schemes in a freeway corridor with limited capacity. In terms of efficiency, both short-run and long-run optimal ramp control schemes are obtained by minimizing the total travel cost and maximizing the total social benefit along the corridor. It is found that for a short-run optimum with inelastic demand, the morning peak period is of the same duration for different on-ramp locations. But for a long-run optimum with elastic demand, the peak duration for various on-ramps increases with the local capacity elasticity of demand. In terms of equity, two measures are defined from a demand-based viewpoint and a space-based viewpoint. It is shown that the short-run optimal ramp control scheme is perfectly fair from a demand-based equity viewpoint. Consequently, two typical ramp control schemes—a perfect demand-based equity scheme and a perfect space-based equity scheme—are introduced and compared with the long-run optimal ramp control scheme in terms of efficiency and equity. Numerical simulations using survey data from China suggest that the perfect demand-based equity scheme attains an economic welfare level that is very close to the optimal one and the conflict between efficiency and equity diminishes as demand becomes less elastic.
► We investigates the efficiency and equity of ramp control schemes in a corridor.
► Two equity measures are defined from demand-based and space-based viewpoints.
► The short-run optimal scheme is perfectly fair from demand-based equity viewpoint.
► Demand-based equity scheme is very close to long-run optimum based on survey data.
► The conflict between efficiency and equity diminishes as demand becomes less elastic.
Journal: Transportation Research Part C: Emerging Technologies - Volume 20, Issue 1, February 2012, Pages 126–143