Study on the Invasion Behavior of E-Bikes with Motor Vehicle Traffic at a Signalized Intersection

2018 ◽  
Vol 2672 (31) ◽  
pp. 33-40 ◽  
Author(s):  
Da Yang ◽  
Xiaoxia Zhou ◽  
Danhong Wu ◽  
Sijing Liu
Keyword(s):  
Traffic Flow ◽  
Motor Vehicle ◽  
Heterogeneous Traffic ◽  
Signalized Intersection ◽  
Motor Vehicles ◽  
Force Model ◽  
Social Force ◽  
Vehicle Traffic ◽  
Proposed Model ◽  
Stop Line

In many developing countries like China, many queuing electric bikes (e-bikes) passing an intersection simultaneously greatly reduces the capacity of the intersection for motor vehicles, by invading the passing area of motor vehicles. To study the invasion effect of e-bikes on the traffic flow of motor vehicles at an urban signalized intersection, this paper proposes a social force model for the heterogeneous traffic flow of motor vehicles and e-bikes. The proposed model is calibrated and validated using real data collected in Chengdu, China. The validation results show that the proposed model can replicate the heterogeneous traffic flow with low errors. Simulations based on the proposed model are conducted to investigate what strategies can reduce the invasion of e-bikes in normal motor vehicle traffic. The results show that when the number of queuing e-bikes before the stop line is more than 20, the two strategies can be applied: the stop-line-ahead strategy and the green-signal-ahead strategy. The study suggests that the 2–4 s of green signal ahead or 3–5 m of stop line ahead for non-motor vehicles can significantly reduce the interference of e-bikes on motor vehicle traffic. In addition, the combination of the two strategies can also obtain the same effect but with smaller change to the original intersection design.

scholarly journals Modeling the Pedestrian Ability of Detecting Lanes and Lane Changing Behavior

2016 ◽  
Vol 10 (7) ◽  
pp. 1
Author(s):  
Mohammed Mahmod Shuaib
Keyword(s):  
Quantitative Measurement ◽  
Force Model ◽  
Social Force ◽  
Lane Changing ◽  
Crowd Dynamics ◽  
Proposed Model ◽  
The Social ◽  
Lane Formation ◽  
Dynamics Models ◽  
The Impact

Incorporating decision-making capability as an intelligence aspect into crowd dynamics models is crucial factor for reproducing realistic pedestrian flow. Crowd dynamics models are still suffering from poor representation of essential behaviors such as lane changing behavior. In this article, we provide the simulated pedestrians in the social force model more intelligence as an extension to the pedestrian’s investigation capability in bidirectional walkways, to let the model appear more representative of what actually happens in reality. In the proposed model, the lane’s structure is modeled as social network. Thereby, the simulated pedestrians with inconvenient walking can detect the available lanes inside his environment, investigate their attractions, and then make decisions to join the most attractive one. Simulations are performed to validate the work qualitatively by tracing the behavior of the simulated pedestrians and studying the impact of this behavior on lane formation. Finally, a quantitative measurement is used to study the effect of our contribution on the pedestrians’ efficiency of motion.

scholarly journals Modeling the Traffic Flow of the Urban Signalized Intersection with a Straddling Work Zone

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Liling Zhu ◽  
Bingmei Jia ◽  
Da Yang ◽  
Yuezhu Wu ◽  
Guo Yang ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Traffic Control ◽  
Negative Impact ◽  
Work Zone ◽  
Signalized Intersection ◽  
Specific Work ◽  
Social Force ◽  
Irregular Boundary ◽  
Factors Affecting ◽  
Boundary Characteristics

Work zones widely exist on urban roads in many countries and have a significant negative impact on traffic. Few studies have focused on modeling the traffic flow of the work zone on the urban arterials, especially on the work zone at the intersections. In this paper, a microscopic model based on the social force theory for the traffic flow of the intersection with a specific work zone, called straddling work zone, is proposed. The model can capture the no lane division and irregular boundary characteristics of the traffic of the intersection with a straddling work zone and also can reflect the interaction of the intersection traffic flows from the two opposite directions. The proposed model is calibrated and validated using the real work zone data, and the results display that the MARE values are all less than 10%. The factors affecting the traffic flow in the straddling work zone are analyzed through simulation. Our study reveals that the distance from the lower edge of the work zone to the median divider of the road and the proportion of large vehicles in the work zone have the greatest impact on the signalized intersection, which provides a reference for the future traffic control at the intersection with the straddling work zone.

CHANGES IN POLISH LEGAL REGULATIONS CONCERNING ROAD TRAFFIC IN THE 20S AND 30S OF THE 20TH CENTURY, IN THE CONTEXT OF AN EXEMPLARY ROAD COLLISION

2018 ◽  
Vol VIII (z. 2) ◽  
pp. 191-201
Author(s):  
Tomasz Sypniewski
Keyword(s):  
20Th Century ◽  
Motor Vehicle ◽  
Road Traffic ◽  
Public Works ◽  
Motor Vehicles ◽  
Legal Regulations ◽  
Normal Functioning ◽  
Vehicle Traffic ◽  
Internal Affairs

Today, looking at the still crowded streets of our cities, we often do not realize how important and essential for their normal functioning are legal regulations of road traffic for all its users. The beginnings of Polish legislation in this field date back to the 1920s. The dynamics of change, occurring in this relatively new field of life, required the introduction of a series of further adjustments and revisions. The Regulation of July 6, 1922 was only six years old. On January 27, 1928, the Minister of Public Works and the Minister of Internal Affairs in agreement with the Minister of Military Affairs passed a regulation on the movement of motor vehicles on public roads. Before 1939, normative acts regulating the rules of motor vehicle traffic were repealed twice and replaced with newer legal acts.

scholarly journals Simulation of Pedestrian Crossing Behaviors at Unmarked Roadways Based on Social Force Model

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Cao Ningbo ◽  
Wei Wei ◽  
Qu Zhaowei ◽  
Zhao Liying ◽  
Bai Qiaowen
Keyword(s):  
Simulation Models ◽  
Force Model ◽  
Extended Model ◽  
Social Force ◽  
Social Force Model ◽  
Proposed Model ◽  
Comparison Results ◽  
Pedestrian Crossing ◽  
Decision Making Model ◽  
Gap Acceptance Theory

Limited pedestrian microcosmic simulation models focus on the interactions between pedestrians and vehicles at unmarked roadways. Pedestrians tend to head to the destinations directly through the shortest path. So, pedestrians have inclined trajectories pointing destinations. Few simulation models have been established to describe the mechanisms underlying the inclined trajectories when pedestrians cross unmarked roadways. To overcome these shortcomings, achieve solutions for optimal design features before implementation, and help to make the design more rational, the paper establishes a modified social force model for interactions between pedestrians and vehicles at unmarked roadways. To achieve this goal, stop/go decision-making model based on gap acceptance theory and conflict avoidance models were developed to make social force model more appropriate in simulating pedestrian crossing behaviors at unmarked roadways. The extended model enables the understanding and judgment ability of pedestrians about the traffic environment and guides pedestrians to take the best behavior to avoid conflict and keep themselves safe. The comparison results of observed pedestrians’ trajectories and simulated pedestrians’ trajectories at one unmarked roadway indicate that the proposed model can be used to simulate pedestrian crossing behaviors at unmarked roadways effectively. The proposed model can be used to explore pedestrians’ trajectories variation at unmarked roadways and improve pedestrian safety facilities.

scholarly journals Bilevel Programming for Traffic Signal Coordinated Control considering Pedestrian Crossing

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Dawei Li ◽  
Yuchen Song ◽  
Qiong Chen
Keyword(s):  
Traffic Flow ◽  
Bilevel Programming ◽  
Motor Vehicle ◽  
Rapid Development ◽  
Coordinated Control ◽  
Traffic Signal ◽  
Motor Vehicles ◽  
Traffic Efficiency ◽  
Pedestrian Delays ◽  
Pedestrian Crossing

With the rapid development of the subway, more and more people choose it as the main method of transportation. However, practically, the large number of pedestrians near some large metro stations can also correspondingly affect the traffic of motor vehicles on the roads adjacent to the stations. In this study, coordinated control of the traffic signal which considers the pedestrian crossing delay is studied based on this background. Firstly, the model of progression band in adjacent intersections is analyzed comprehensively, and the calculation formulas of progression bandwidth and the delay of vehicles which are from the progression of traffic flow under different conditions are given. Secondly, five different models of pedestrian delay are analyzed. Under different conditions of motor vehicle and pedestrian traffic flow, the Vissim fitting and proofreading are carried out and the optimal models under different conditions are obtained. Finally, the bilevel programming problem which fuses the above two models is determined; by coding an algorithm, it can be resolved. Furthermore, taking eight signalized intersections from Jiming Temple to Daxinggong along Nanjing Metro Line 3 as the actual background, the calculation and optimization of coordinated control are carried out. It is found that at the expense of the traffic efficiency of large intersections to a certain extent, a wider progression band can be formulated on the roads between them, and pedestrian delays can be reduced in general.

Study on the Interference Ratio of Right-Turning Vehicles at Signalized Intersection under Mixed Traffic Environment

2011 ◽  
Vol 267 ◽  
pp. 555-560
Author(s):  
Shan Shan Lee ◽  
Da Lin Qian ◽  
Dong Mei Lin ◽  
Zhao Yong Peng
Keyword(s):  
Flow Rate ◽  
Wave Theory ◽  
Signalized Intersection ◽  
Motor Vehicles ◽  
Delay Model ◽  
Two Phase ◽  
Proposed Model ◽  
Traffic Wave ◽  
The Right ◽  
Bicycle Lane

The objective is to describe the interference degree between motor vehicles and bicycles at signalized intersection. The interference degree was expressed by conflict delay. Via analyzing the microscopic actions of the motor vehicles crossing through the bicycle flow at a typical two-phase signalized intersection, a conflict delay model of the right-turn vehicle was proposed applying the gap acceptance theory and traffic wave theory. The model was verified and compared with the existing conflict delay models. The result showed that the proposed model is stable and suitable for the condition of unsaturated to calculate the conflict delay of right-turn vehicle. Sensitivity of the conflict delay model with respect to the flow rate of the bicycle and the width of the bicycle lane was analyzed. It showed that the increase of the width of the bicycle lane within limits could reduce right-turning vehicle’s conflict delay effectively when the motor vehicle’s flow rate was higher and the bicycle flow rate was varying in a certain range.

The Impact Analysis of Signal Intersection Right-Turn Motor Vehicles on Straight Bicycles

2012 ◽  
Vol 253-255 ◽  
pp. 2014-2019
Author(s):  
Lin Wang ◽  
Shu Ping Jia
Keyword(s):  
Data Analysis ◽  
Impact Analysis ◽  
Motor Vehicle ◽  
Motor Vehicles ◽  
Calculation Formula ◽  
Flow Calculation ◽  
Vehicle Traffic ◽  
The Impact

The characteristics of the intersection of bicycle was studied through survey and data analysis, and we got straight bicycle losses flow calculation formula under the influence of right turn motor vehicle. Through simulation to analysis the impact of its capacity further when motor vehicle traffic, plus the deceleration and the proportion of bus changes, and measures were proposed to improve bicycle capacity.

scholarly journals Macroscopic Traffic-Flow Modelling Based on Gap-Filling Behavior of Heterogeneous Traffic

2021 ◽  
Vol 11 (9) ◽  
pp. 4278
Author(s):  
Muhammad Umair Khan ◽  
Salman Saeed ◽  
Moncef L. Nehdi ◽  
Rashid Rehan
Keyword(s):  
Traffic Flow ◽  
Heterogeneous Traffic ◽  
Gap Filling ◽  
New Model ◽  
Flow Models ◽  
Flow Modelling ◽  
Complex Interactions ◽  
Proposed Model ◽  
Traffic Flow Models ◽  
Traffic Flow Modelling

Traffic-flow modelling has been of prime interest to traffic engineers and planners since the mid-20th century. Most traffic-flow models were developed for the purpose of characterizing homogeneous traffic flow. Some of these models are extended to characterize the complex interactions involved in heterogeneous traffic flow. Existing heterogeneous traffic-flow models do not characterize the driver behavior leading to gap filling in heterogeneous traffic conditions. This study aimed at explaining the gap-filling behavior in heterogeneous traffic flow by using the effusion model of gas particles. The driver’s behavior leading to gap filling in heterogeneous traffic was characterized through developing analogies between the traffic flow and the Maxwell–Boltzmann equation for effusion of gases. This model was subsequently incorporated into the Payne–Whitham (PW) model by replacing the constant anticipation term. The proposed model was numerically approximated by using Roe’s scheme, and numerical simulation of the proposed model was then carried out by using MATLAB. The results of the proposed and PW models were therefore compared. It is concluded that the new model proposed in this study not only produces better results compared to the PW model, but also better captures the expected reality. The main difference between the behavior of the two models is that the effect of bottleneck in the density of traffic is propagated in the form of a shockwave travelling backwards in time in the new model, while the PW model does not exhibit this effect.

Evaluation of Innovative Bike-Box Application in Eugene, Oregon

2000 ◽  
Vol 1705 (1) ◽  
pp. 99-106 ◽  
Author(s):  
William W. Hunter
Keyword(s):  
Motor Vehicle ◽  
Traffic Signals ◽  
Traffic Signal ◽  
Target Group ◽  
Motor Vehicles ◽  
Vehicle Traffic ◽  
Frequency Of Use ◽  
Before And After ◽  
Signal Changes ◽  
The Right

An innovative “bike box”—a right-angle extension to a bike lane (BL) at the head of the intersection—was installed with accompanying traffic signs but no extra traffic signals at a busy downtown intersection featuring two one-way streets in Eugene, Oregon, in summer 1998. The box allows bicyclists traveling to the intersection in a left side BL to get to the head of the traffic queue on a red traffic signal indication and then proceed ahead of motor vehicle traffic toward a right side BL when the traffic signal changes to green. Cyclists traveling through the intersection were videotaped before and after placement of the box. The videotapes were coded to evaluate operational behaviors and conflicts with motorists, other bicyclists, and pedestrians. Twenty-two percent of the bicyclists who approached in the left side BL and then crossed to the BL on the right side of the street (the bicyclists for whom the box was most intended) used the box. Many more bicyclists in this target group could have used the box (i.e., they had a red signal indication and enough time to move into the box). A problem with motor vehicle encroachments into the box likely diminished the frequency of use. The rate of conflicts between bicycles and motor vehicles changed little in the before and after periods. No conflicts took place while the bike box was being used as intended.

scholarly journals An Evacuation Model for Passenger Ships That Includes the Influence of Obstacles in Cabins

2017 ◽  
Vol 2017 ◽  
pp. 1-21 ◽  
Author(s):  
Baocheng Ni ◽  
Zhen Li ◽  
Pei Zhang ◽  
Xiang Li
Keyword(s):  
Force Model ◽  
Social Force ◽  
Key Factors ◽  
Social Force Model ◽  
Interaction Forces ◽  
Factors Affecting ◽  
Agent Based ◽  
Proposed Model ◽  
Passenger Ships ◽  
Passenger Behavior

Passenger behavior and ship environment are the key factors affecting evacuation efficiency. However, current studies ignore the interior layout of passenger ship cabins and treat the cabins as empty rooms. To investigate the influence of obstacles (e.g., tables and stools) on cabin evacuation, we propose an agent-based social force model for advanced evacuation analysis of passenger ships; this model uses a goal-driven submodel to determine a plan and an extended social force submodel to govern the movement of passengers. The extended social force submodel considers the interaction forces between the passengers, crew, and obstacles and minimises the range of these forces to improve computational efficiency. We drew the following conclusions based on a series of evacuation simulations conducted in this study: (1) the proposed model endows the passenger with the behaviors of bypassing and crossing obstacles, (2) funnel-shaped exits from cabins can improve evacuation efficiency, and (3) as the exit angle increases, the evacuation time also increases. These findings offer ship designers some insight towards increasing the safety of large passenger ships.

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