Arterial Traffic Signal Coordination for General and Public Transport Vehicles Using Dedicated Lanes

Han

Journal of Advanced Transportation

2022

Passive transit-signal priority (TSP) is an effective approach to improve the operational efficiency of transit systems on arterial roads. This paper presents an integrated TSP model that benefits both transit vehicles and other road users. The proposed model uses the random arrival characteristics of transit vehicles related to their stochastic dwell times at near-side stops. Thus, it enables not only two-way bandwidth maximization within subsystems but also the combined optimization of adjacent subsystems. To minimize any negative impact on side-street traffic, this study, unlike previous research, considers the influential area by the introduction of TSP. Case studies on 15 intersections in Sejong, Korea, verify the superior performance of the proposed model for both transit and general vehicles.

Section: Problem Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transit Signal Priority for an Integrated Traffic Signal System

Han

Journal of Advanced Transportation

2022

“…PM-BAND, developed by Ma et al [20], presented a bi-level control algorithm for passenger car and bus signal coordination. Florek [21] used BUS-MULTIBAND and BUS-AM-BAND to improve the travel speed of buses and passenger cars. However, the models based on these studies were limited because they confined their operation to one bus per signal cycle.…”

Section: Introductionmentioning

confidence: 99%

Progression Control Model to Enhance Performance of Transit Signal Priority

Han

2022

IEEE Access

Journal of Advanced Transportation

“…Another research direction is to improve the efficiency of bus systems. Lots of studies have investigated signal timings at intersections along bus lines such as bus signal coordination [9][10][11]. Due to the connected vehicle environment, bus information (e.g., bus service time [12] and travel time [13]) can be collected in real time for signal timings and control strategies can be sent to buses for trajectory control [8].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Bus Scheduling and Bus-Berth Matching at Curbside Stops under Connected Vehicle Environment

2022

It is commonly seen that buses are blocked by the ones in front serving passengers and have to queue outside a curbside bus stop although there are vacant berths at the stop. The resultant bus delays degrade the service level of urban public transportation. A potential solution is to reschedule the arrivals of the buses at the stop for full utilization of the berths with the aid of connected vehicle technologies. This study proposes a mixed-integer linear programming model to optimize the scheduling of bus arrivals and the bus-berth matching at a curbside stop under the connected vehicle environment. The objective is the minimization of the bus delays weighted by the number of passengers on the buses. Bus arrival times at the stop and the assignment of berths are optimized together with bus departure times from the stop. Bus punctuality is also taken into consideration. The proposed model could be applied dynamically to cater to time-varying traffic conditions. Numerical studies validate the advantages of the proposed model over the “first-come-first-service” strategy and the relaxed model without bus punctuality in terms of weighted bus delays and bus punctuality. Sensitivity analyses show that (1) the proposed model is robust to the fluctuation of bus service time and (2) a smaller number of berths may be preferred on the condition that the bus demand does not exceed the stop capacity.