Tram-Oriented Traffic Signal Timing Resynchronization

Ji, Yuxiong; Tang, Yu; Wang, Wei; Du, Yuchuan

doi:10.1155/2018/8796250

Cited by 8 publications

(6 citation statements)

References 17 publications

(25 reference statements)

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“…Additionally, simpler solutions of tram traffic control are the subject of current research. Solutions based on time-based control [52] as well as control solutions without tram priority elements [53] have been described.…”

Section: Discussionmentioning

confidence: 99%

“…Because of the inclusion in the analysis of the accommodative control, with an extremely random character, these parameters were determined by simulation, and not by an analytical method. In this paper, the calculation of the emission of pollutants by individual transport was based on measures of effectiveness (MOEs) used in other papers: delay [6,11,15,27,37,[50][51][52], travel speed [11,16], and traveled distance and stops. Additionally, the following MOEs were used to assess the quality of control: tram delay [6,11,27,50], tram stops [16,27], tram operating speed [10,16,28], and travel speed [11,16].…”

Section: Discussionmentioning

confidence: 99%

“…In the literature, there are also indicators such as queue length [11,37,50], v/c ratio [37], and tram capacity [13], which were not used because on the analyzed route problems concerning capacity for both individual vehicles and public transport do not occur in any of the variants. Further indicators found in the literature may be derived from the above-mentioned indicators of travel time [7,14,16,52], tram travel time [13] (with variability) [12,51,52], and level of service [50], or they may refer to other issues such as person delay / passenger waiting time [14,51], number of crashes [8,54] (with severity and frequency), and bandwidth [51]. However, analyses of energy consumption were carried out only in Reference [25], but there was no such detailed analysis of traffic control in that study-the analysis is based only on a comparison of control strategies, while the authors' research uses control by the algorithm designed specifically for the given route.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Traffic Light Priority for Trams in Warsaw as a Tool for Transport Policy and Reduction of Energy Consumption

et al. 2021

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The article presents an analysis of priority solutions for trams at a selected sequence of intersections in Warsaw (Poland). An analysis of the literature has shown the topicality of this issue. A computer simulation model of a coordinated sequence of intersections was constructed. Three test scenarios were designed: the existing control system, the new coordinated fixed-time control system, and the adaptive control system with active priority. In the simulation process, detailed travel characteristics of trams and other traffic participants in a selected section were obtained for the three varying scenarios. Electric energy consumption for traction needs and pollutant emissions was then estimated for each of the variants. It was concluded that for the analyzed configuration, implementation of the adaptive priority will result in a reduction of tram time losses by up to 25%, a reduction in energy consumption by up to 23%, and a reduction in the emission of pollutants from individual vehicles by up to 3% in relation to the original variant. The conducted research may be the basis for a comprehensive method of assessing the effectiveness of applying the adaptative priority when designing new tramway lines and modernizing the existing ones.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Traffic Light Priority for Trams in Warsaw as a Tool for Transport Policy and Reduction of Energy Consumption

et al. 2021

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“…Therefore, some scholars have researched the optimization of tram timetables. Ji et al 13 developed a mixed integer model to resynchronize traffic signal timings to guarantee tram movements. Jiang et al 14 proposed a model to optimize the tram timetable under passive adjustment of signal timing at junctions to minimize tram travel time.…”

Section: Literature Reviewmentioning

confidence: 99%

An optimization model of tram timetables considering various signal priority strategies

et al. 2022

Sci Rep

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Modern trams generally operate in a semi-independent Right Of Way that intersects with social vehicles at junctions. Typically, there are two signal priority strategies at junctions: active signal priority strategy and no-signal priority strategy. The active signal priority strategy is applied to improve the efficiency of the tram. However, it inevitably causes delays to social vehicles. The no-signal priority strategy could reduce the influence on social vehicles, but it will increase the tram travel time. Therefore, we develop a Mixed-Integer Linear Programming model to optimize the tram timetable and consider various signal priority strategies. In the model, the signal priority strategies of the tram are a set of decision variables that consider the traffic flow of social vehicles rather than fixed input parameters. The model considers minimizing the overall travel time of the tram and the negative utility of signal priority strategies. A numerical experiment is conducted to demonstrate the validity of the proposed model. The experimental results show that the proposed method can optimize the tram timetable and maximize the overall benefits of the junction. Moreover, we compare the experimental results of the proposed method with the approach of fixing the signal priority strategy for the tram at junctions. On the one hand, our proposed method can improve the operational efficiency of trams, i.e., the travel time decreases by 16.60%. On the other hand, the negative utility of signal priority for the comprehensive scheme proposed in this work reduces by 39.45%.

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“…Such an assessment of saturation flow is traditional. A significant part of professionals considers saturation flow as permanent traffic intensity of passage the stop-line from the queue of big length [6][7][8][9][10][11].…”

Section: Fig 2 Research Of Peak Traffic Intensity [1]mentioning

confidence: 99%

Analysis of saturation flow on isolated lanes of controlled intersections with significant traffic intensity

Murovanyi¹,

Mazyliuk²

2020

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The methods and results of the investigation of intervals between vehicles during queue dissipation before controlled intersections with the further determination of saturation flow are reviewed in this paper. Having reviewed existing methods of determining the saturation in traffic flows, those are determined which provide the most certain results in conditions of intensive movement and take into account quite a large number of impact factors. Such methods are based on experimental measurement of intervals between vehicles during their passage through the stop-line in different directions of the controlled intersection. For the completeness of the analysis of such intervals, such factors are considered additionally as traffic composition and use of lanes by directions. Objects of the research are controlled intersections on approaches to which the slope is absent, there is no pedestrian and cyclist movement during the performance of turn, and conflicting traffic flows and also public transport stops in the zone of the intersection. The transitional research result is the determination of the number of vehicles that pass the stop-line during the permissive signal and time intervals between them, and the final result is the oncoming of saturation period on the lanes of straight and turns movement depending on traffic flow composition.

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Tram-Oriented Traffic Signal Timing Resynchronization

Cited by 8 publications

References 17 publications

Traffic Light Priority for Trams in Warsaw as a Tool for Transport Policy and Reduction of Energy Consumption

Traffic Light Priority for Trams in Warsaw as a Tool for Transport Policy and Reduction of Energy Consumption

An optimization model of tram timetables considering various signal priority strategies

Analysis of saturation flow on isolated lanes of controlled intersections with significant traffic intensity

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