scholarly journals Estimating Road Traffic Capacity

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 228525-228547
Author(s):  
Ahmed Adnan Makki ◽  
Trung Thanh Nguyen ◽  
Jun Ren ◽  
Dhiya Al-Jumeily ◽  
William Hurst
Keyword(s):  
Road Traffic ◽  
Traffic Capacity

scholarly journals The Optimization of Emergency Evacuation from Nuclear Accidents in China

2018 ◽  
Vol 10 (8) ◽  
pp. 2737 ◽  
Author(s):  
Yang Zou ◽  
Shuliang Zou ◽  
Changming Niu
Keyword(s):  
Nuclear Power ◽  
Road Traffic ◽  
Emergency Evacuation ◽  
External Factors ◽  
Nuclear Accidents ◽  
Diagram Method ◽  
Emergency Rescue ◽  
Network Diagram ◽  
Traffic Capacity ◽  
Evacuation Route

An emergency evacuation route is an important component of emergency rescue of for nuclear accidents. A reasonable evacuation route can reduce evacuation times and protect people’s life. The evacuation route of the nuclear power plant is abstracted into a network diagram and a mathematical model of evacuation optimization route based on the graph theory and the parity of spot diagram method in this paper. Road traffic capacity and other external factors that may affect emergency evacuation are considered in the time weight factor for each road. Finally, an example is given to verify the feasibility of the model.

scholarly journals The Capacity of the Road Network: Data Collection and Statistical Analysis of Traffic Characteristics

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1765 ◽  
Author(s):  
Vladimir Shepelev ◽  
Sergei Aliukov ◽  
Kseniya Nikolskaya ◽  
Salavat Shabiev
Keyword(s):  
Data Collection ◽  
Road Traffic ◽  
Negative Consequences ◽  
The Road ◽  
Traffic Characteristics ◽  
Traffic Capacity ◽  
Traffic Data Collection ◽  
Fuzzy Logic Method ◽  
Additional Fuel Consumption ◽  
Additional Fuel

The possibilities of collecting the necessary information using multi-touch cameras and ways to improve road traffic data collection are considered. An increase in the number of vehicles leads to traffic jams, which in turn leads to an increase in travel time, additional fuel consumption and other negative consequences. To solve this problem, it is necessary to have a reliable information collection system and apply modern effective methods of processing the collected information. The technology considered in the article allows taking into account pedestrians crossing the intersection. The purpose of this article is to determine the most important traffic characteristics that affect the traffic capacity of the intersection, in other words, the actual number of passing cars. Throughput is taken as a dependent variable. Based on the results of the regression analysis, a model was developed to predict the intersection throughput taking into account the most important traffic characteristics. Besides, this model is based on the fuzzy logic method and using the Fuzzy TECH 5.81d Professional Edition computer program.

City Occupancy and Road Capacity Model

2014 ◽  
Vol 1044-1045 ◽  
pp. 1538-1540 ◽  
Author(s):  
Yi Lin Fan ◽  
Bei Chen Cheng ◽  
Li Li Cao ◽  
Kun Cheng Huang
Keyword(s):  
Cross Section ◽  
Road Traffic ◽  
The Road ◽  
Road Capacity ◽  
Traffic Capacity ◽  
Capacity Model ◽  
The Cross ◽  
Definition Of ◽  
The Impact ◽  
Accident Case

In this paper, we study the impact of city driveway occupancy on the urban road traffic capacity. Through the analysis of the scene of an accident case, we gained the vehicle statistics within a cross section in unit time and then did calculation and simulation. The work is concluded as a reasonable model of vehicle queue relationship evaluation.First, on the base of the definition of traffic capacity, statistics of the cars in the cross section before the accident, during the accident and after the accident have been respectively acquired in unit time (1 min). Then we employ Matlab to do the interpolation fitting, drawing the change of actual capacity of the road from the beginning time of an accident to the time when traffic resumes. The work comes to a conclusion that the change of the capacity at the cross section has a pattern of periodic fluctuation.

Traffic Carrying Capacity and Improving Measures of Shenzhen

2012 ◽  
Vol 253-255 ◽  
pp. 1605-1610
Author(s):  
Ling Sheng Wu
Keyword(s):  
Sustainable Development ◽  
Scenario Analysis ◽  
Carrying Capacity ◽  
Rapid Growth ◽  
Road Traffic ◽  
Status Quo ◽  
Fully Integrated ◽  
Traffic Capacity ◽  
The Status ◽  
Improvement Measures

With the rapid growth of cars, road traffic of Shenzhen continued approaching even beyond the limits of carrying capacity, This paper analyzes the status quo of Shenzhen traffic capacity, traffic capacity in the fully integrated on the basis of factors, scenario analysis, the ultimate bearing capacity of Shenzhen traffic proposed improvement measures. The context of tight constraints of resources, economic, social and environment, resources, coordinated and sustainable development.

Simulation Research of Flow and Speed on Urban Expressway Interchange Entrance

2013 ◽  
Vol 779-780 ◽  
pp. 796-799
Author(s):  
Liang Wang ◽  
Yu Jie Wang ◽  
Ling Yu Wang
Keyword(s):  
Traffic Flow ◽  
Road Traffic ◽  
Service Level ◽  
Simulation Software ◽  
Simulation Research ◽  
Main Road ◽  
Microscopic Traffic Simulation ◽  
Urban Expressway ◽  
Traffic Capacity ◽  
And Control

The urban expressway overpass entrance is an important node of the urban road system. Traffic jams often happen at entrance. The characteristics of urban expressway entrance and the advantages of the microscopic traffic simulation were combined to analyze capacity of entrance. VISSIM simulation software was used and the validity of the simulation model was verified. The influence of the main road traffic flow and the desired speed of entrance to flow and speed of the urban expressway entrance were analyzed through simulation experiment. On the whole, traffic capacity of urban expressway entrance reduces with the increase of traffic flow on the main road. The higher the desired speed is, the faster traffic capacity reduces. The increase of speed and control of main road traffic flow is of great significance for improving the capacity and service level of expressway.

scholarly journals MTCS: A Method of Analyzing the Traffic Capacity of Urban Bus Lane Based on Vissim Simulation

2021 ◽  
Author(s):  
Hongtao Yuan ◽  
Huizhen Zhang ◽  
Minglei Liu ◽  
Cheng Wang ◽  
Yubiao Pan ◽  
...  
Keyword(s):  
Simulation Model ◽  
Traffic Flow ◽  
Public Transport ◽  
Empirical Formula ◽  
Road Traffic ◽  
The Road ◽  
Traffic Capacity ◽  
Urban Public Transport ◽  
Bus Lane ◽  
Urban Bus

Abstract As an effective method of improving the attractiveness of urban public transport and alleviating urban traffic congestion, bus lanes play an important role in the urban public transport system. The research on the capacity of bus lanes is conducive to improve the operation efficiency of urban bus roads and improve the service level of urban public transport. To obtain the maximum capacity of the bus lane, on one hand, the empirical formula can be used for theoretical calculation, and on the other hand, the simulation model can be established for analysis and verification. Based on the idea of simulation, a method using Vissim is proposed, called MTCS (Minimum Traffic Capacity Substitution Method). The method divides the bus lane into different sections by intersections and stops, establishes simulation model of the bus lane to calculate the traffic capacity of each section such as vehicle speed and flow and select the minimum traffic capacity of the sections as the traffic capacity of the bus lane, which is verified by using the road saturation. The simulation process uses the actual travel speed and traffic flow of the bus lane as evaluation indicators, with the aim of maximizing the road traffic flow while the actual speed of vehicles on the road is close to the desired speed, thus achieving the desired road traffic state. To verify and improve the effectiveness of the method, its analysis results are compared with the empirical formula, and various methods of enhancing traffic capacity are quantitatively simulated. The parameters of the simulation model are set by the actual bus lane example, and the experimental results show that by the methods of modifying the stop-station mode and the signal-lamp cycle, 10% and 14% improvements can be achieved, respectively. This has a good reference value for the construction of bus lanes and the adjustment of road facilities.

scholarly journals Analysis Method on Network Capacity of Belt Freeway

2018 ◽  
Vol 175 ◽  
pp. 03023
Author(s):  
Shengwen Tu ◽  
Junjie Chen ◽  
Yao Zhang
Keyword(s):  
Road Network ◽  
Road Traffic ◽  
Flow Distribution ◽  
Network Capacity ◽  
Service Level ◽  
Analysis Method ◽  
Traffic Capacity ◽  
The Status ◽  
Freeway Capacity ◽  
Expressway Construction

An analysis method on network capacity of belt freeway based on road network reserve capacity is put forward in this paper. Through the introduction of multiple multiplier, the method can simply analyse the maximum traffic volume contained by belt freeway in the conditions of a given network basic demand and meeting the constraints of road traffic capacity and service level. In comparison to the traditional method, the proposed method takes into consideration actual network structure, OD flow distribution, the traveller choosing the way, etc. Additionally, the analysis conclusion is more consistent with the actual situation. Analysis results of belt freeway capacity of Yancheng city in China show that the presented method is not only simple and practical, but also can objectively reflect the status of the belt freeway capacity, and provide a basis for decision-making of belt freeway expansion and urban expressway construction.

The Study on High Way Traffic Capacity Based on the Maximum-Flow Algorithm

2014 ◽  
Vol 575 ◽  
pp. 589-593 ◽  
Author(s):  
Ke Nan Wang ◽  
Hai Xing Wang
Keyword(s):  
Road Traffic ◽  
Research Work ◽  
Maximum Flow ◽  
Network Capacity ◽  
Highway Traffic ◽  
Highway Capacity ◽  
Main Research ◽  
Traffic Capacity ◽  
Flow Algorithm ◽  
Highway Network

The high way with its characteristics of high flow, fast, safe and comfortable, has played an important role in road traffic. In this paper, based on the maximum-flow algorithm, study on the traffic capacity of highway. Firstly, explain the basic theory of highway traffic capacity.Then, focusing on the method of maximum-flow algorithm to calculate the highway capacity, convert it into usable calculation mathematical model, explain the problem and cite an example.Finally,summarized the full text of the research work. The main research achievements and innovation in this paper is studying the highway network capacity from the macro level, use a quantitative study on the highway traffic capacity of the network.

Effects of Lanes Occupied on Urban Road Traffic Capacity

2014 ◽  
Vol 926-930 ◽  
pp. 3798-3801
Author(s):  
Zhi Wei Yang
Keyword(s):  
Traffic Flow ◽  
Road Traffic ◽  
Flow Speed ◽  
Urban Traffic ◽  
Correction Coefficient ◽  
Dynamic Changes ◽  
Traffic Jam ◽  
The Road ◽  
Discharge Capacitance ◽  
Traffic Capacity

The article is research on the influence of urban lane occupied for the road traffic capacity. Under the condition that the density of urban traffic flow is big, and it‘s successional, we consider the quantity of vehicle is continuous. Through analyzing the dynamic changes of the road traffic capacity and its influencing factors after accidents, we can get reasonable suggestions of reducing the length of traffic jam. First we establish a flow-speed-density model to describe the dynamic changes of the road traffic capacity. Then we can compare the traffic flow to the electric current according to its continuity. So the upstream traffic flow and the traffic capacity of the accident cross section are equal to the charging current and the discharging current. And the vehicle queue is translated to the voltage of the charge-discharge capacitance. We can get the length of the vehicle queue by the formula of the capacitance voltage approximately. Finally the correction coefficient is introduced. In conclusion, the road traffic capacity is depended on the distance from the upstream intersection and the lane that the accident happened on and so on. Meanwhile, if we don’t solve the accident timely, the length will rise sharply. It will cause serious traffic jam. So we suggest relevant departments timely deal with the accident, evacuate the traffic, and prompt drivers to change lanes in advance.

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