scholarly journals A Cross-Sector Framework to Boost the Sustainable Implementation of Integrated Transport and Spatial Strategies to Improve Safety and Mobility of Moto-Taxi Riders

2021 ◽  
Vol 3 ◽  
Author(s):  
Murungi Elizabeth Mwebesa ◽  
Chun-Chen Chou ◽  
Kento Yoh ◽  
Kenji Doi
Keyword(s):  
Traffic Congestion ◽  
Questionnaire Survey ◽  
Road Safety ◽  
Traffic Management ◽  
Management Strategies ◽  
Noise Pollution ◽  
Road User ◽  
African Cities ◽  
Spatial Strategies ◽  
New City

Globally, motorcycle riders make up the biggest percentage of vulnerable road user fatalities. The percentages are higher in African cities where moto-taxi transport is not only the most readily available mode of transport but also a source of income for many especially the youth. Many African cities are re-strategizing on how to sustainably deal with problems like traffic congestion, unplanned development, flooding, air and noise pollution. The authors carried out a questionnaire survey targeting a variety of road safety stakeholders to identify road safety solutions that they think best fit the current situation. Another questionnaire survey targeting moto-taxi riders was carried out, and the data analyzed by SEM to identify how different solutions interact to affect the behavior of riders. Results show that education and training programs have the biggest effect on improving behavior of riders as they adapt to new city regulations such as zoning. Other aspects such as presence of customers, behavior of other road users, road environment were also explored. Currently, city authorities in some developing nations are looking to introduce spatial regulations such as zoning and traffic management strategies such as exclusive lanes. Therefore, the contribution of this study is a proposal of a combination of solutions that different road safety stakeholders in developing countries can contribute toward the sustainable improvement of the safety of riders.

scholarly journals Identify Optimal Traffic Condition and Speed Limit for Hard Shoulder Running Strategy

2021 ◽  
Vol 13 (4) ◽  
pp. 1822
Author(s):  
Fan Yang ◽  
Fan Wang ◽  
Fan Ding ◽  
Huachun Tan ◽  
Bin Ran
Keyword(s):  
Cellular Automata ◽  
Traffic Congestion ◽  
Traffic Management ◽  
Clustering Algorithm ◽  
Mean Shift ◽  
Management Strategies ◽  
Speed Limit ◽  
Clustering Methods ◽  
Traffic Condition ◽  
Cellular Automata Model

Highway system is experiencing increasing traffic congestion with fast-growing number of vehicles in metropolitan areas. Implementing traffic management strategies such as utilizing the hard shoulder as an extra lane could increase highway capacity without extra construction work. This paper presents a method of determining an optimal traffic condition and speed limit of opening hard shoulder. Firstly, the traffic states are clustered using K-Means, mean shift, agglomerative and spectral clustering methods, and the optimal clustering algorithm is selected using indexes including the silhouette score, Davies-Bouldin Index and Caliski-Harabaz Score. The results suggested that the clustering effect of using K-Means method with three categories is optimal. Then, cellular automata model is used to simulate traffic conditions before and after the hard shoulder running strategy is applied. The parameters of the model, including the probabilities of random deceleration, slow start and lane change, are calibrated using real traffic data. Four indicators including the traffic volume, the average speed, the variance of speed, and the travel time of emergency rescue vehicles during traffic accident obtained using the cellular automata model are used to evaluate various hard shoulder running strategies. By using factor analysis and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) methods, the optimal traffic condition and speed limit of opening hard shoulder could be determined. This method could be applied to highway segments of various number of lanes and different speed limits to optimize the hard shoulder running strategy for highway management.

scholarly journals Pengaruh Kebijakan ““4 in 1”” terhadap Kinerja Persimpangan Jl Dr. Djunjunan – Tol Pasteur dengan Menggunakan Simulasi Mikro

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Andrean Maulana
Keyword(s):  
Traffic Congestion ◽  
Traffic Management ◽  
Management Strategies ◽  
Maximum Length ◽  
City Government ◽  
Signalized Intersection ◽  
Passenger Cars ◽  
Mean Delay ◽  
Before And After ◽  
Traffic Signal Timing

ABSTRAKKebijakan “4 in 1” diterapkan sebagai salah satu solusi untuk permasalahan kemacetan di kota Bandung. Adapun tujuan dari penerapan kebijakan “4 in 1” adalah meningkatkan kinerja persimpangan Tol Pasteur – Jl. Dr Djunjunan atau Simpang Pasteur. Untuk analisis kinerja Simpang Pasteur, digunakan model simulasi mikro dengan perangkat Paramics. Analisis dilakukan terhadap dua kondisi yaitu kondisi dengan kebijakan “4 in 1” dan kondisi tanpa kebijakan “4 in 1”. Terjadi pengurangan panjang antrian maksimum sebesar 148,79 meter dan tundaan rata-rata simpang sebesar 7,6 detik. Lalu, dilakukan pengubahan waktu sinyal untuk meningkatkan kinerja simpang Pasteur . Waktu siklus yang didapat sebesar 52 detik, dengan rincian waktu hijau fase satu dan dua sebesar 15 detik dan fase tiga sebesar 14 detik. Dengan waktu siklus terbaik ini dapat menghasilkan pengurangan panjang antrian maksimum sebesar 239 meter dan tundaan rata-rata simpang sebesar 46 detik.Kata kunci: simulasi, mikro, antrian, tundaan, sinyal  ABSTRACTBandung city government recently applied “4 in 1” strategy as one of city's traffic management strategies to resolve traffic congestion that occurs at many city's main streets. By applying that rule, hopefully it will reduces, even eliminates traffic congestion that usually occurs at Dr. Djunjunan street during peak hours. Since the program prohibits any passenger cars that carry less than 4 passengers to cross Dr. Djunjunan street, it will affects every street at Pasteur signalized intersection and the intersection itself. Therefore, this study was conducted to analyze Pasteur signalized intersection's performance before and after the application of “4 in 1” strategy. The analysis was conducted using micro-simulation model that generated from Paramics software.The analysis was conducted in two condition, with or without “4 in 1” strategy. Results from analysis indicates that there will be 148,79 meter difference of maximum length of queue and 7,6 seconds difference of mean delay time between those two condition at Pasteur signalized intersection. The analysis also conducted by changing traffic signal timing in order to obtain better performance of Pasteur signalized intersection. Results from analysis indicates that there will be 239 meter reduction of maximum length of queue and 46 second of mean delay time.Keywords: simulation, micro, queue, delay, signal.

scholarly journals Implementation of Different Traffic Management Strategies on Major Roads for the Improvement of Traffic Flow in Lahore City

2020 ◽  
Vol 4 (4) ◽  
pp. 1-14
Author(s):  
Nazam Ali ◽  
Hashir Zia ◽  
Hamza Bin Sarwar ◽  
Zafar Baig ◽  
Muhammad Abdullah
Keyword(s):  
Traffic Congestion ◽  
Traffic Management ◽  
Management Strategies ◽  
Design Guidelines ◽  
Design Strategies ◽  
Future Design ◽  
Design Practices ◽  
Traffic Delays ◽  
The City ◽  
Lahore City

Traffic congestion causes many socio-economic problems in developing nations. One of the main causes of traffic congestion can be attributed to poor design practices. In the last few years, Lahore city has expanded haphazardly where the allocation of resources was done based on political will instead of feasible design practices. This haphazard growth coupled with a poor design resulted in traffic congestion on the main roads of the city. In this study, simulations using different traffic management design strategies were carried out on major roads to check if traffic delays and Level of Service (LOS) can be improved. The most feasible designs based on the simulated results were proposed for the improvement of the existing infrastructure designs. These findings suggested that Akbar Chowk and Jinnah Hospital Intersection have greatly reduced the traffic delay time by 92.97% and 92.67%, respectively. Policymakers can utilize these simulated results for future design guidelines to accommodate the future growth of traffic on these arterial roads.

Quantifying the Mobility Benefits of Express Lanes using Real-Time Traffic Data

2020 ◽  
Vol 2674 (11) ◽  
pp. 414-423
Author(s):  
Cecilia Kadeha ◽  
Priyanka Alluri ◽  
Thobias Sando
Keyword(s):  
Traffic Congestion ◽  
Urban Areas ◽  
Traffic Management ◽  
Management Strategies ◽  
Time Of Day ◽  
General Purpose ◽  
Performance Measure ◽  
Study Results ◽  
Transportation Agencies ◽  
Express Lanes

Traffic congestion is one of the major problems facing transportation agencies, especially in urban areas. Agencies are exploring ways to use the existing transportation infrastructure efficiently by deploying appropriate traffic management strategies. One of these strategies is the use of express lanes, which are expected to effectively mitigate congestion and increase the reliability of highway facilities. Express lanes are managed toll lanes, separated from general-purpose lanes within a freeway facility. The goal of this study was to quantify the mobility benefits of express lanes by comparing the performance of express lanes with that of their adjacent general-purpose lanes, and by assessing the performance of the general-purpose lanes when the express lanes were open versus when the express lanes were closed. The Buffer Index (BI), a travel time reliability measure, was selected as the performance measure. The analysis was based on 95Express, express lanes along I-95 in Miami, Florida. Overall, the results indicated that BIs for the express lanes were significantly lower than the BIs for the general-purpose lanes, and the BIs for the general-purpose lanes were significantly lower when the express lanes were open compared with the periods when the express lanes were closed. The study results showed mobility improvements on both the express lanes and the general-purpose lanes, although the extent of the improvements varied by direction (i.e., northbound and southbound) and time of day (i.e., a.m. peak, p.m. peak, daytime off-peak, and nighttime off-peak). Transportation agencies may use these findings to quantify and evaluate the mobility benefits of the express lanes and the general-purpose lanes on express lane facilities.

Development of Decision Support System for Integrated Active Traffic Management Systems Considering Travel Time Reliability

2020 ◽  
Vol 2674 (2) ◽  
pp. 167-180 ◽  
Author(s):  
Whoibin Chung ◽  
Mohamed Abdel-Aty ◽  
Ho-Chul Park ◽  
Qing Cai ◽  
Mdhasibur Rahman ◽  
...  
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Travel Time ◽  
Support System ◽  
Traffic Congestion ◽  
Traffic Management ◽  
Management Strategies ◽  
Travel Time Reliability ◽  
Traffic Condition ◽  
Traffic Conditions

A new decision support system (DSS) using travel time reliability was developed for integrated active traffic management (IATM) including freeways and arterials. The DSS consists of recommendation and evaluation of response plans. The DSS also includes three representative traffic management strategies: variable speed limits, queue warning, and ramp metering. The recommendation of response plans for recurring traffic congestion was generated from the logics of the three strategies. The evaluation of response plans was conducted by travel time reliability through the prediction of traffic conditions with response plans. The near-future prediction of traffic conditions with control strategies was conducted through METANET for freeways and arterials. The developed DSS was evaluated under three types of traffic congestion: extreme, heavy, and moderate. According to the evaluation results, the developed DSS recommended an IATM strategy with the highest synergistic relationships in real time and contributed to enhancing the effectiveness of the IATM strategies. It was confirmed that arterials should have the allowable residual capacity for the improvement of traffic flow of the entire corridor network. Furthermore, the DSS demonstrated a more balanced traffic condition between freeways and arterials.

Analysis of Freeway Accident Detection

1997 ◽  
Vol 1603 (1) ◽  
pp. 80-89 ◽  
Author(s):  
M. J. Corby ◽  
F. F. Saccomanno
Keyword(s):  
Traffic Congestion ◽  
Traffic Management ◽  
Management Strategies ◽  
Freeway Traffic ◽  
Vehicle Accidents ◽  
Traffic Characteristics ◽  
Time To Detection ◽  
Freeway Incidents ◽  
Time Required ◽  
Accident Detection

Instrumented traffic management can assist in the detection of freeway incidents and reduce the time required to initiate effective traffic management strategies and emergency response measures. Although instrumented freeway traffic management is concerned primarily with general incidents, reportable vehicle accidents are the focus of this research. Reportable accidents account for 20 percent of all freeway incidents and give rise to much of the nonrecurrent traffic congestion experienced on many freeways. Explored here is how the use of various accident-detection criteria, such as change in speed, vehicle occupancy, and traffic volume, affects the time to detection for a mix of factors (preaccident traffic characteristics, accident lane-blockage pattern, position and distance of detector with respect to each accident). A representative sample of Toronto freeway accidents for 1994 was analyzed using analysis of variance. The results of this analysis suggest ways in which instrumented detection of freeway accidents can be made more efficient by reducing the time to detection.

Courses to Fine Tune Traffic Management and Road Safety

2019 ◽  
Author(s):  
Suppakorn Poonyarith ◽  
Chankanit Kritaya Suriyamanee ◽  
Sunee Kanyajit
Keyword(s):  
Road Safety ◽  
Traffic Management ◽  
Fine Tune

scholarly journals Formation of the Traffic Flow Rate under the Influence of Traffic Flow Concentration in Time at Controlled Intersections in Tyumen, Russian Federation

2021 ◽  
Vol 13 (15) ◽  
pp. 8324
Author(s):  
Viacheslav Morozov ◽  
Sergei Iarkov
Keyword(s):  
Traffic Flow ◽  
Flow Rate ◽  
Traffic Congestion ◽  
Traffic Management ◽  
System Analysis ◽  
Motor Vehicle ◽  
Experimental Studies ◽  
Transport Systems ◽  
Experiment Planning ◽  
Traffic Light

Present experience shows that it is impossible to solve the problem of traffic congestion without intelligent transport systems. Traffic management in many cities uses the data of detectors installed at controlled intersections. Further, to assess the traffic situation, the data on the traffic flow rate and its concentration are compared. Latest scientific studies propose a transition from spatial to temporal concentration. Therefore, the purpose of this work is to establish the regularities of the influence of traffic flow concentration in time on traffic flow rate at controlled city intersections. The methodological basis of this study was a systemic approach. Theoretical and experimental studies were based on the existing provisions of system analysis, traffic flow theory, experiment planning, impulses, probabilities, and mathematical statistics. Experimental data were obtained and processed using modern equipment and software: Traficam video detectors, SPECTR traffic light controller, Traficam Data Tool, SPECTR 2.0, AutoCad 2017, and STATISTICA 10. In the course of this study, the authors analyzed the dynamics of changes in the level of motorization, the structure of the motor vehicle fleet, and the dynamics of changes in the number of controlled intersections. As a result of theoretical studies, a hypothesis was put forward that the investigated process is described by a two-factor quadratic multiplicative model. Experimental studies determined the parameters of the developed model depending on the directions of traffic flow, and confirmed its adequacy according to Fisher’s criterion with a probability of at least 0.9. The results obtained can be used to control traffic flows at controlled city intersections.

scholarly journals Simulation and measurement of air quality in the traffic congestion area

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Shin Yu ◽  
Chang Tang Chang ◽  
Chih Ming Ma
Keyword(s):  
Air Quality ◽  
Traffic Congestion ◽  
Traffic Management ◽  
Reference Model ◽  
Dispersion Model ◽  
Fluid Model ◽  
Three Dimensional ◽  
Vehicle Speed ◽  
Management Plans ◽  
Dimensional Distribution

AbstractThe traffic congestion in the Hsuehshan tunnel and at the Toucheng interchange has led to traffic-related air pollution with increasing concern. To ensure the authenticity of our simulation, the concentration of the last 150 m in Hsuehshan tunnel was simulated using the computational fluid dynamics fluid model. The air quality at the Toucheng interchange along a 2 km length highway was simulated using the California Line Source Dispersion Model. The differences in air quality between rush hours and normal traffic conditions were also investigated. An unmanned aerial vehicle (UAV) with installed PM2.5 sensors was developed to obtain the three-dimensional distribution of pollutants. On different roads, during the weekend, the concentrations of pollutants such as SOx, CO, NO, and PM2.5 were observed to be in the range of 0.003–0.008, 7.5–15, 1.5–2.5 ppm, and 40–80 μg m− 3, respectively. On weekdays, the vehicle speed and the natural wind were 60 km h− 1 and 2.0 m s− 1, respectively. On weekdays, the SOx, CO, NO, and PM2.5 concentrations were found to be in the range of 0.002–0.003, 3–9, 0.7–1.8 ppm, and 35–50 μg m− 3, respectively. The UAV was used to verify that the PM2.5 concentrations of vertical changes at heights of 9.0, 7.0, 5.0, and 3.0 m were 45–48, 30–35, 25–30, and 50–52 μg m− 3, respectively. In addition, the predicted PM2.5 concentrations were 40–45, 25–30, 45–48, and 45–50 μg m− 3 on weekdays. These results provide a reference model for environmental impact assessments of long tunnels and traffic jam-prone areas. These models and data are useful for transportation planners in the context of creating traffic management plans.

scholarly journals Evaluation of the Applicability of the Ramp Metering to a Freeway Using Microsimulation: A Case Study in Riyadh, Saudi Arabia

2019 ◽  
Vol 9 (20) ◽  
pp. 4406
Author(s):  
Seongkwan Lee ◽  
Amr Shokri ◽  
Abdullah Al-Mansour
Keyword(s):  
Saudi Arabia ◽  
Traffic Congestion ◽  
Traffic Management ◽  
Fixed Time ◽  
Ramp Metering ◽  
Traffic Data ◽  
Geometrical Data ◽  
Overall Performance ◽  
Length Reduction

Riyadh, the capital of Saudi Arabia, suffers from traffic congestion like other modern societies, during peak hours but also all day long, even without any incidents. To solve this horrible traffic congestion problem, various efforts have been made from the Active Traffic Management (ATM) aspect. Ramp metering (RM) is one of the representative methods of the ATM and has already proven its value in many locations worldwide. Unfortunately, RM has not yet been fully implemented in Saudi Arabia. This research aimed to assess the applicability of RM to a freeway in Riyadh using microsimulation. The widely known software VISSIM (PTV Planung Transport Verkehr AG, Germany, 1992) was chosen to compare the performances of various RM operating scenarios, such as fixedtime operation with different sub-scenarios and traffic-responsive operation using ALINEA (Asservissement Lineaire d’entree Autoroutiere) algorithm. For the simulations, this study targeted Makkah Road, one of the major freeways in Riyadh, and collected geometrical data and traffic data from that freeway. Analysis of four main scenarios and eight sub-scenarios, proved that overall performance of the fixed-time RM operation is generally good. The sub-scenario 4V3R of the fixed-time RM operation was the best in average queue length reduction. However, the traffic-responsive operation was best in average speed improvement.

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