scholarly journals ENHANCING THE EFFECTIVE FUNCTIONING OF INTERSECTIONS WITH INTENSIVE TRAFFIC AND PEDESTRIAN FLOWS

2021 ◽  
Vol 23 ◽  
pp. 61-67
Author(s):  
A. Renkas ◽  
D. Rudenko ◽  
V. Tovaryanskyy
Keyword(s):  
Traffic Flow ◽  
High Intensity ◽  
Light Regulation ◽  
Light Signal ◽  
Traffic Light ◽  
Flow Models ◽  
The Road ◽  
Rail Vehicles ◽  
Traffic Delays ◽  
Pedestrian Traffic

Introduction. Problematic sections of the road network are intersections with high traffic intensity of conflicting pedestrian and traffic flow, in particular, right and left turns. At such crossings, there are significant traffic delays. In the case of vehicles turning left or right at an intersection when passing at a traffic light signal that allows traffic, should give way to pedestrians crossing the roadway on the crosswalk. In the case of high intensity of pedestrian traffic, it is impossible to complete the turn of such vehicles, they remain at the intersection, so there are significant traffic delays for returning vehicles.Purpose. Therefore, the work aims to study the interaction of traffic and pedestrian flows with high intensity at regulated intersections to improve their capacity.Methods. To study the parameters of traffic flows, in particular, the length of congestion, we used traffic flow models, which include a psychophysiological model of following a vehicle moving in front, and a model based on traffic rules. To model, pedestrian flows the Wiedemann model was used. The leastsquares method was used to obtain empirical nonlinear dependences of congestion length on the intensities of conflicting pedestrian and traffic flows.Results. The paper uses known methods for solving applied problems in the field of traffic for some unique cases, namely the intersection of intensive -traffic and pedestrian flows. Studies of road and pedestrian traffic parameters at crossings have shown that the length of congestion significantly depends on the intensity of traffic flow, but with increas-ing intensity of pedestrian traffic more than 1000 people/h, the length of congestion changes insignificantly. If there are trams at the intersection, the length of congestion increases by an average of 1.14% and depends significantly on the intensity of traffic and pedestrian flows.It is proposed to introduce three-phase traffic light regulation on such sections when one of the phases allows traffic only for pedestrians. The simulation results showed that the length of congestion in the absence of rail vehicles on the approaches to the intersection decreases by an average of 45.3% and is weakly dependent on the intensity of pedestrian flows. If there are rail vehicles at the crossing, the length of congestion can reduce by an average of 13.7%. But in some cases may increase.Conclusion. The research methodology presented in this paper can be used for intersections with another traffic organization scheme to justify the feasibility of introducing threephase traffic light control when one of the phases allows traffic only to pedestrians.

Effect of pedestrian traffic light on traffic flow accompany with pedestrian crossing

2021 ◽  
pp. 126059
Author(s):  
Yanhong Wang ◽  
Chong Zhang ◽  
Pengbin Ji ◽  
Tianning Si ◽  
Zhenzhen Zhang
Keyword(s):  
Traffic Flow ◽  
Traffic Light ◽  
Pedestrian Traffic ◽  
Pedestrian Crossing

LIGHT REGULATION SYSTEMS IMPROVEMENT ANALYSIS TO FORECAST THE TRANSPORT FLOWS IN ALMATY

2021 ◽  
Vol 116 (1) ◽  
pp. 299-304
Author(s):  
Assel Aliyadynovna Sailau
Keyword(s):  
Environmental Pollution ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Light Regulation ◽  
Transport Network ◽  
Traffic Flows ◽  
Traffic Light ◽  
Traffic Lights ◽  
The Road ◽  
Transport Telematics

The number of vehicles on the roads of Almaty, Kazakhstan is growing from year to year. This brings about an increasing intensity and density of traffic flows in the streets which leads to congestion, decreasing speed of the traffic flow, increasing environmental pollution caused by car emissions, and which can potentially lead to the road traffic accidents (RTA), including fatalities. While the number of injuries grows up mainly due to drivers’ non-compliance with the speed limit, the environmental pollution is caused by longer traffic jams. Therefore, to reduce the level of road traffic injuries and emissions into the environment it is necessary to ensure the uniform movement of traffic flows in cities. Currently, one of the effective ways to do it is the use of transport telematics systems, in particular, control systems for road signs, road boards and traffic lights. The paper presents an analysis of existing systems and methods of traffic light regulation. The  analyses of the systems and methods are based on the use of homogeneous data, that is the data on standard parameters of traffic flows. The need in collecting and analyzing additional semi-structured data on the factors that have a significant impact on the traffic flows parameters in cities is shown as well. The work is dedicated to solving the problem of analysis and forecast of traffic flows in the city of Almaty, Kazakhstan. GPS data on the location of individual vehicles is used as the initial data for solving this problem. By projecting the obtained information onto the graph of the city's transport network, as well as using additional filtering, it is possible to obtain an estimate of individual parameters of traffic flows. These parameters are used for short-term forecast of the changes in the city's transport network.

scholarly journals Automatic traffic light controller for emergency vehicle using peripheral interface controller

2019 ◽  
Vol 9 (3) ◽  
pp. 1788 ◽  
Author(s):  
Norlezah Hashim ◽  
Fakrulradzi Idris ◽  
Ahmad Fauzan Kadmin ◽  
Siti Suhaila Jaapar Sidek
Keyword(s):  
Traffic Congestion ◽  
Traffic Management ◽  
Emergency Situation ◽  
Light Signal ◽  
Emergency Vehicle ◽  
Traffic Light ◽  
Traffic Lights ◽  
The Road ◽  
Light Area ◽  
On The Road

Traffic lights play such important role in traffic management to control the traffic on the road. Situation at traffic light area is getting worse especially in the event of emergency cases. During traffic congestion, it is difficult for emergency vehicle to cross the road which involves many junctions. This situation leads to unsafe conditions which may cause accident. An Automatic Traffic Light Controller for Emergency Vehicle is designed and developed to help emergency vehicle crossing the road at traffic light junction during emergency situation. This project used Peripheral Interface Controller (PIC) to program a priority-based traffic light controller for emergency vehicle. During emergency cases, emergency vehicle like ambulance can trigger the traffic light signal to change from red to green in order to make clearance for its path automatically. Using Radio Frequency (RF) the traffic light operation will turn back to normal when the ambulance finishes crossing the road. Result showed the design is capable to response within the range of 55 meters. This project was successfully designed, implemented and tested.

scholarly journals PREDICTIVE MODELLING OF TRAFFIC FLOWFLOW IN AKURE, NIGERIA: UNSIGNALIZED INTERSECTIONS IN FOCUS

2017 ◽  
Vol 10 (2) ◽  
pp. 270-278
Author(s):  
Adebayo Oladipo Owolabi ◽  
Olugbenga Joseph Oyedepo ◽  
Enobong Etim Okoko
Keyword(s):  
Traffic Flow ◽  
Predictive Modelling ◽  
Study Data ◽  
Geometric Features ◽  
Peak Period ◽  
Flow Models ◽  
The Road ◽  
Traffic Characteristics ◽  
Unsignalized Intersections ◽  
Before And After

Unsignalized intersections namely two-way stop-controlled intersection (TWSC) and all-way stop-controlled intersection (AWSC) are widely used in Akure. Five intersections consisting of three Tee and two Cross that were critical to traffic flow in the study area were selected for study. Data on geometric features were collected using odometer, while traffic parameters were captured and metered using cine camera placed at a vantage point from the road section during peak and off-peak periods on week days. Traffic flows at the intersections were expressed as functions of traffic characteristics and geometric features of the approaches; while the effect of distances of intersections before and after the intersections studied were also incorporated as a correction factors in the models. The models were developed using multiple linear regression technique with the aid of SPSS software and validated with empirical data other than those used for model calibration. Adjusted R2 values of 0.881 and 0.882 were obtained for Tee and Cross intersections respectively for peak period, while 0.938 and 0.940 respectively were obtained for the off-peak period. These indicate that the flow models are very robust in replicating the observed data. The predictive models have the potential to accurately estimate traffic flow at intersections in the study area and other cities of the world with similar traffic conditions.

scholarly journals Optimization of cycle time on signalized intersections of H.E.A Mokodompit Street – M.T Haryono – H.A. Nasution Kendari city based on traffic flow volume

2021 ◽  
Vol 1 (1) ◽  
pp. 039-048
Author(s):  
Ridwan Syah Nuhun ◽  
Usman Rianse ◽  
Marsuki Iswandi ◽  
Adris Ade Putra ◽  
Abdul Kadir ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Cycle Time ◽  
Traffic Control ◽  
Service Level ◽  
Light Signal ◽  
Signalized Intersections ◽  
Degree Of Saturation ◽  
Traffic Light ◽  
The North ◽  
Control Light

Intersection of H.E.A. Mokodompit Street – M.T. Haryono – H.A. Nasution is one of the signalized intersections in Kendari City which has congestion problems, vehicle accumulation and vehicle queues at each arm of the intersection at rush hour due to the large volume of traffic flow and not optimal cycle timing from the traffic light signal. The purpose of this study is to optimize the cycle time of traffic control light signals based on traffic volume and to analyze the performance of these intersections. The results of the analysis based on the volume of traffic flow obtained the optimal cycle time of 72 seconds with the division of green time in each approach by 18 seconds for the north approach, 14 seconds for the eastern approach and 28 seconds for the south approach. The degree of saturation at each intersection arm is 0.82 which is at the service level D.

scholarly journals Optimization of Traffic Flow On KS Tubun Street using Greenberg Model

2019 ◽  
Vol 8 (2S7) ◽  
pp. 83-86
Keyword(s):  
Traffic Flow ◽  
Red Light ◽  
Green Light ◽  
Light Cycle ◽  
Traffic Light ◽  
Traffic Jam ◽  
Traffic Lights ◽  
The Road ◽  
Road Users ◽  
Time Parameters

KS Tubun Street is a street in Bogor, which has a fairly high vehicle volume and become one of a high-traffic jam area. This is caused by KS Tubun Street is the main road for road users from Jakarta and Bogor. Traffic jam problem that occurs due to the confluence interchange of traffic flow and traffic lights settings that are not proportional to the volume of vehicles across the road. Optimization of traffic flow at KS Tubun Street performed by the stages of forming a model of traffic flow, determining the density and velocity of the vehicle is based on the Greenberg model, and determining the length of the traffic lights to avoid a buildup of vehicles. The result is a traffic flow model with distance and time parameters. The density of vehicles that occurs on the streets of KS. Tubun street based on the Greenberg model between 180 to 240 unit car of passanger (ucp) with the average velocity of vehicles 15 to 19.5 km per hour. The density of vehicles on KS. Tubun street can be break down by increasing time. Traffic light cycle time can be reduced for 8 seconds with the red light glowing time is 80 seconds and the green light glowing time is 62 seconds.

Organization of non-traffic jam traffic at an intersection when cycle time and roadway width are limited

2020 ◽  
Keyword(s):  
Traffic Flow ◽  
Road Safety ◽  
Traffic Management ◽  
Road Network ◽  
Traffic Light ◽  
Maximum Capacity ◽  
Traffic Jam ◽  
The Road ◽  
Traffic Management System ◽  
Stop Line

In General, two problems need to be solved in the traffic management system: road safety and capacity. In this paper, it is proposed to use a calculated way to optimize the cycle of a traffic light object in order to ensure the maximum capacity of the node of the road network. The calculation method is based to determining the optimal ratio of the number of lanes intended for vehicle traffic and the duration of a cycle of the traffic light object. Keywords capacity, street and road network, traffic flow, stop line, width of the roadway

scholarly journals Qualitative assessment of the composition of the traffic flow

2021 ◽  
Vol 341 ◽  
pp. 00033
Author(s):  
Anastasia Shevtsova ◽  
Alina Burlutskaya
Keyword(s):  
Traffic Flow ◽  
Traffic Control ◽  
Qualitative Assessment ◽  
Traffic Light ◽  
Technical Parameters ◽  
The Road ◽  
Passenger Vehicles ◽  
Car Park ◽  
The Difference ◽  
Saturation Flow

The car park is growing at a rapid pace every year. According to the official statistics of the traffic police service, on the roads of the Russian Federation, mainly passenger vehicles prevail, accounting for 80-90% of the total number of cars. Passenger vehicles include a large number of various vehicles that differ from each other in design and technical parameters, with an overall length of 2.5 m to 5.8 m. The difference in overall length affects the value of the dynamic dimension and, accordingly, the throughput of the road network, which requires constant monitoring and improvement, especially when using technical traffic control systems. It is necessary to consider the influence of the main parameters of the traffic flow when calculating the saturation flow at an intersection controlled by a traffic light object.

scholarly journals DETERMINATION OF THE CONDITIONS FOR THE APPLICATION OF THE F. WEBSTER FORMULA FOR DETERMINING THE TRANSPORT DELAY AT A CIRCULAR INTERSECTION WITH TRAFFIC LIGHT REGULATION AND A CUT-THROUGH CENTRAL ISLAND

2021 ◽  
pp. 76-86
Author(s):  
Yu.Ya. Komarov ◽  
◽  
S.V. Ganzin ◽  
D.D. Silchenkov ◽  
◽  
...  
Keyword(s):  
Traffic Congestion ◽  
Road Network ◽  
Road Traffic ◽  
High Reliability ◽  
Calculated Data ◽  
Light Regulation ◽  
Traffic Light ◽  
Software Complex ◽  
Transport Delay ◽  
The Road

The main method of determining transport delay in the national methodical and educational literature is its calculation according to the methodology (formula) of F. Webster (1958), which is based on the theory of mass service. However, in conditions of high traffic congestion or traffic congestion, experimental and calculated data at simple intersections vary considerably. The definition of delays for complex intersections, in particular for the Hamburger Through-About Intersection (further HTAI) is also contradictory. The aim of the study is to improve determine the area of application of F. Webster’s formula for a little-studied roundabouts HTAI. For the first time, the paper addresses the selection of parameters of the HTAI in urban settings, and also introduces a method of calculating transport delays depending on various factors. For the purpose of the study, the hypothesis is put forward that the application of the Webster formula depends on the intensity of traffic on the main and secondary roads, the degree of loading in directions and transport demand for left-turning traffic. According to the hypothesis, on the basis of the collected data, transport delays are calculated on the HTAI from the selected factors. To justify the adequacy of calculations, the method of simulation in the Aimsun (micro-modeling) software complex is used. On the basis of in-kind surveys of section of the road network, a high-reliability simulation model was created, reflecting the current situation at regulated intersection, and also assessed the feasibility of using the HTAI on a section of the road network. There are dependencies of transport delays on traffic in the main and secondary road, effective duration of the cycle of regulation on the main road, traffic on roundabout, the diameter of the islet for the HTAI. Thus, based on the resulting mathematical model, the range of application of the Webster formula is defined, which is affected by the number of lanes for the main and secondary roads, the degree of loading in directions and the number of lanes on the ring. Further research involves the development of a methodology for calculating the parameters of the HTAI.

TRAFFIC FLOW INFLUENCED BY TRAFFIC LIGHT AND TURNING PROBABILITY FOR A CROSSROAD

2004 ◽  
Vol 18 (17n19) ◽  
pp. 2658-2662 ◽  
Author(s):  
HUILI TAN ◽  
CHAOYING ZHANG ◽  
LINGJIANG KONG ◽  
MUREN LIU
Keyword(s):  
Boundary Condition ◽  
Cellular Automaton ◽  
Traffic Flow ◽  
Cellular Automaton Model ◽  
Open Boundary ◽  
Open Boundary Condition ◽  
Traffic Light ◽  
Cycle Times ◽  
The Road ◽  
The Impact

A cellular automaton model with open boundary condition for a crossroad system controlled by a traffic light is presented. The traffic flow and speed of the first part of the road are quite different from those of the second part behind the crossing. The impact of turning probabilities and the cycle times of traffic light on the flow are investigated.

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