Sustainable Intersection Control Accommodating Urban Freight Mobility
In this research, the authors studied green extension of a two-phased vehicle−actuated signal at an isolated intersection between two one-way streets. The green phase is extended by a preset time interval, referred to as critical gap, from the time of a vehicle arrival. The green phase switches if there is no arrival during the critical gap. The authors developed a model following a Poisson process that studied the intersection performance of traffic. The authors extended the model to cover the case of general traffic. Additionally, they derived system performance measures. Their findings show that their model is fairly flexible in accommodating freight traffic, and their model in the general case is asymptotically accurate under heavy traffic. Numerical tests show that the presence of critical gaps increases vehicle delay in most cases. This finding is enlightening regarding current practices.
TRT Terms: Freight traffic; Green interval (Traffic signal cycle); Signalized intersections; Sustainable transportation; Traffic actuated controllers; Traffic signal timing; Urban transportation