Empirical and simulation study of traffic delay at un-signalized crosswalks due to conflicts between pedestrians and vehicles

Xin, Xiuying; Jia, Ning; Ma, Shoufeng; Mu, Jing

doi:10.1080/21680566.2018.1460880

Cited by 10 publications

(7 citation statements)

References 15 publications

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“…Different pedestrian-vehicle interaction mechanisms will affect the implementation effect of EPP [10]. Scholars at home and abroad have found that traffic environment factors [11,12], pedestrian factors [1,9,[13][14][15], and vehicle factors [12,16] will affect the pedestrian-vehicle interaction mechanism at signalized intersections. e pedestrian-vehicle interaction mechanism will directly affect the traffic model of signalized intersections (including capacity estimation model [17], delay estimation model [14], signal timing [18], etc.)…”

Section: Brief Review On Epp and Pedestrian-vehicle Interactionmentioning

confidence: 99%

“…ere are different types of pedestrian-vehicle interaction situations in each pedestrianvehicle interaction zone. According to the previous research [1,23] and the modeling requirements of this paper, this study divides pedestrian-vehicle interaction situations into following categories: (1) vehicle yield to pedestrian and simultaneously pedestrian yield to vehicle, (2) vehicle yield to pedestrian, (3) pedestrian yield to vehicle, and (4) vehicle does not yield to pedestrian and simultaneously pedestrian does not yield to vehicle. To facilitate the model presentation, the key notations used here after are summarized in Table 1.…”

Section: Problem Descriptionmentioning

confidence: 99%

“…At conventional twophase signalized intersections, pedestrian-vehicle interaction exists in each phase, such as vehicle yield to pedestrian and pedestrian yield to vehicle. ese interaction processes lead to the increase of traffic delay for pedestrians and motor vehicles and even traffic accidents between pedestrians and vehicles when some failed interaction situation occurs, resulting in casualties and economic losses [1]. e reasonable setting of exclusive pedestrian phase (EPP) can completely eliminate the pedestrian-vehicle interaction zones at two-phase signalized intersections and ensure the safety of crossing pedestrians at the cost of slightly improving of the traffic delay [2].…”

Section: Introductionmentioning

confidence: 99%

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Conditions for Setting Exclusive Pedestrian Phases at Two-Phase Signalized Intersections considering Pedestrian-Vehicle Interaction

Wang

Yang

Zhao

2021

Journal of Advanced Transportation

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In order to analyze the effectiveness of setting exclusive pedestrian phase (EPP) under different vehicle yielding rates, the effect of EPPs on traffic efficiency is studied and a setting condition of EPP considering pedestrian-vehicle interaction is proposed in this paper. First, the main factors influencing the behavior of vehicles and pedestrians during pedestrian-vehicle interaction are analyzed, and a pedestrian-vehicle interaction (PVI) model at the crosswalk of urban road is established. Second, assuming that vehicle arrival obeys the Poisson distribution, the delay models of vehicle passengers and pedestrians crossing the street at the intersection are established, and taking the total delay of traffic participants as the main index, the setting condition of EPP are proposed. Third, based on the video of pedestrian-vehicle interaction at crosswalks, the parameters of the proposed model are calibrated. Through sensitivity analysis, the change of the total delay of traffic participants is analyzed under different conditions of pedestrian and vehicle arrival rates. Finally, by introducing pedestrian-vehicle interaction rules, a cellular automata (CA) simulation platform of pedestrian-vehicle interaction in crosswalk is established; based on the field data of Shanghai, a simulation model of intersection is established, and the total delay, queue length, and vehicle throughput under conventional signal control plan and EPP plan are compared. The results show that the pedestrian-vehicle interaction process has a great influence on the total delay of traffic participants at intersections, and pedestrian-vehicle interaction should be considered in the setting conditions of EPP. Under the same condition of vehicular flow, the more the pedestrian flow is, the smaller the delay increment will be. The higher the vehicle yielding rate is, the smaller the delay increment will be after setting EPP.

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Section: Brief Review On Epp and Pedestrian-vehicle Interactionmentioning

confidence: 99%

Section: Problem Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conditions for Setting Exclusive Pedestrian Phases at Two-Phase Signalized Intersections considering Pedestrian-Vehicle Interaction

Wang

Yang

Zhao

2021

Journal of Advanced Transportation

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“…Different pedestrian-vehicle interaction mechanisms will affect the control effect of the right-turn signal (13). Scholars in China and other countries have found that traffic environment factors, pedestrian factors, and vehicle factors affect the pedestrian-vehicle interaction mechanism of signalized intersections (1,(14)(15)(16)(17)(18)(19)(20)(21). The pedestrian-vehicle interaction mechanism directly affects the traffic model of signalized intersections (e.g., capacity estimation model, delay estimation model), and then changes the optimization conditions of the right-turn signal (9,18,22,23).…”

Section: Brief Review On Right-turn Signal Control and Pedestrian-vehicle Interaction Researchmentioning

confidence: 99%

“…There are different types of pedestrian-vehicle interaction situations in each pedestrian-vehicle interaction zone. According to previous research and the modeling requirements of this paper, it is necessary to divide the pedestrian-vehicle interaction situations into following categories: (1) vehicle yields to a pedestrian and simultaneously the pedestrian yields to the vehicle, (2) the vehicle yields to a pedestrian, (3) the pedestrian yields to a vehicle, (4) the vehicle does not yield to a pedestrian and simultaneously the pedestrian does not yield to a vehicle (14,16).…”

Section: Problem Descriptionmentioning

confidence: 99%

Optimizing Right-Turn Signals to Benefit Pedestrian–Vehicle Interactions

Wang

Yang

Dong

et al. 2021

Transportation Research Record: Journal of the Transportation R

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In most right-driving urban signalized intersections, right-turn vehicle signals do not usually control turns. To address the problem of signal control in a pedestrian–vehicle interaction, this paper establishes a right-turn signal optimization (RTSO) model that considers both efficiency and safety. First, the main factors influencing the behavior of vehicle and pedestrian during pedestrian–vehicle interaction are analyzed, and a pedestrian–vehicle interaction model (PVI model) at an urban road crosswalk is established. This model is used to determine the probabilities of four pedestrian–vehicle interaction situations. Then, based on the traffic conflict theory, the next step was to construct an objective function that minimizes the total delay of traffic participants considering pedestrian–vehicle interactions, and another objective function that minimizes the potential conflicts considering pedestrian–vehicle interactions. Then, an RTSO model is obtained by introducing a safety-efficiency coefficient to combine the previously described two constructed functions. Finally, the PVI model and delay model are verified through video observation data and the establishment of a cellular automata simulation platform of pedestrian–vehicle interaction. Using these models, a field signal plan, the delay minimization scheme, the conflict minimization scheme, and the proposed scheme are numerically analyzed under different yielding rates. This proposed scheme is further numerically analyzed under different safety-efficiency coefficients. The results show that this paper’s RTSO model has certain advantages in increasing safety and reducing delay. In addition, using these results, this paper gives a recommended value for the safety-efficiency coefficients in different application scenarios.

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Walking towards a happy city

Loo

2021

Journal of Transport Geography

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Empirical and simulation study of traffic delay at un-signalized crosswalks due to conflicts between pedestrians and vehicles

Cited by 10 publications

References 15 publications

Conditions for Setting Exclusive Pedestrian Phases at Two-Phase Signalized Intersections considering Pedestrian-Vehicle Interaction

Conditions for Setting Exclusive Pedestrian Phases at Two-Phase Signalized Intersections considering Pedestrian-Vehicle Interaction

Optimizing Right-Turn Signals to Benefit Pedestrian–Vehicle Interactions

Walking towards a happy city

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