On Traffic Control Means Recognition in Intelligent Monitoring and Traffic Safety

2013 ◽  
pp. 439-452 ◽  
Author(s):  
M. V. Yashina ◽  
A. A. Vinogradov
Keyword(s):  
Traffic Safety ◽  
Traffic Control ◽  
Intelligent Monitoring

Improvement of METANET Model Based on Critical Density Modeling for Traffic Control

2021 ◽  
Author(s):  
Lina Fu ◽  
Jie Fang ◽  
Yunjie Lyu ◽  
Huahui Xie
Keyword(s):  
Traffic Safety ◽  
Traffic Control ◽  
Traffic Congestion ◽  
Field Data ◽  
Critical Density ◽  
Predictive Performance ◽  
Density Model ◽  
Model Based ◽  
Freeway Control ◽  
Density Modeling

Freeway control has been increasingly used as an innovative approach to ease traffic congestion, improve traffic safety and reduce exhaust emissions. As an important predictive model involved in freeway control, the predictive performance of METANET greatly influences the effect of freeway control. This paper focuses on modifying the METANET model by modeling the critical density. Firstly, the critical density model is deduced based on the catastrophe theory. Then, the perturbation wave and traveling wave that are obtained using the macro and micro data, respectively, have been developed to modify the above proposed critical density model. Finally, the numerical simulation is established to evaluate the effectiveness of the modified METANET model based on the field data from the realistic motorway network. The results show that overall, the predicted data from the modified METANET model are closer to the field data than those obtained from the original model.

Simulation of VANET Applications

2010 ◽  
pp. 264-282 ◽  
Author(s):  
Valentin Cristea ◽  
Victor Gradinescu ◽  
Cristian Gorgorin ◽  
Raluca Diaconescu ◽  
Liviu Iftode
Keyword(s):  
Traffic Safety ◽  
Traffic Control ◽  
Critical Analysis ◽  
Simulation Tool ◽  
Future Trends ◽  
And Control

This chapter systematically presents actual issues regarding the simulation of VANET applications. Some of them refer to challenges in developing VANET simulators. The chapter discusses simulator architectures, models used for representing the communication among vehicles, vehicles mobility features, and simulation tool implementation methods. A critical analysis of the solutions adopted in some well-known actual simulators is also included. Other issues relate to the use of simulation in the evaluation of applications that aim at improving the traffic safety and control. Representative city and highway application scenarios are discussed, and results that can be obtained by simulation, along with ways these results can be exploited by VANET developers and users are highlighted. Future trends in the development of simulators that produce more accurate results and their use for the evaluation of more sophisticated traffic control solutions are also included.

scholarly journals Human Factors Analysis of Air Traffic Safety Based on HFACS-BN Model

2019 ◽  
Vol 9 (23) ◽  
pp. 5049 ◽  
Author(s):  
Tao Lyu ◽  
Wenbin Song ◽  
Ke Du
Keyword(s):  
Human Factors ◽  
Traffic Safety ◽  
Traffic Control ◽  
Human Error ◽  
Air Traffic ◽  
General Aviation ◽  
Objective Data ◽  
Factors Analysis ◽  
Four Levels ◽  
Human Factors Analysis

Air traffic control (ATC) performance is important to ensure flight safety and the sustainability of aviation growth. To better evaluate the performance of ATC, this paper introduces the HFACS-BN model (HFACS: Human factors analysis and classification system; BN: Bayesian network), which can be combined with the subjective information of relevant experts and the objective data of accident reports to obtain more accurate evaluation results. The human factors of ATC in this paper are derived from screening and analysis of 142 civil and general aviation accidents/incidents related to ATC human factors worldwide from 1980 to 2019, among which the most important 25 HFs are selected to construct the evaluation model. The authors designed and implemented a questionnaire survey based on the HFACS framework and collected valid data from 26 frontline air traffic controllers (ATCO) and experts related to ATC in 2019. Combining the responses with objective data, the noisy MAX model is used to calculate the conditional probability table. The results showed that, among the four levels of human factors, unsafe acts had the greatest influence on ATC Performance (79.4%), while preconditions for safe acts contributed the least (40.3%). The sensitivity analysis indicates the order of major human factors influencing the performance of ATC. Finally, this study contributes to the literature in terms of methodological development and expert empirical analysis, providing data support for human error management intervention of ATC in aviation safety.

scholarly journals Traffic Lights on Consecutive Intersections and Pedestrian Crossings Along Linear Settlements Located on National Roads

2012 ◽  
Vol 1 (1) ◽  
pp. 1-9
Author(s):  
Alina Burlacu ◽  
Mihai Dicu ◽  
Valentin Anton
Keyword(s):  
Traffic Safety ◽  
Traffic Control ◽  
Performance Indicators ◽  
Central Area ◽  
Traffic Data ◽  
Traffic Lights ◽  
Micro Simulation ◽  
Pedestrian Traffic ◽  
National Road ◽  
Traffic Measurements

Abstract In Romania, with time, settlements located along the main roads have developed and transformed into linear towns, with significant local and connection traffic, important administrative, economic, commercial and touristic activities concentrated in the central area, as well as pedestrian traffic of over 200 pedestrians per hour in the main pedestrian crossings on the route. The object of the present study is made by a series of junctions situated on National Road 1 in Busteni town, on a dangerous road sector. For this study, traffic measurements, simulations and suggestions for improving the existing situation were made. Based on the simulated traffic flows, there were performed capacity analysis with PTV Vissim and Traficware Synchro softwares, and were developed appropriate planning solutions for the intersections, resulting in tables with extracted performance indicators based on micro simulation of the traffic values. Also planning solutions for horizontal design and proposals for traffic lights were made for junctions that can not operate under priority traffic on one direction or which are presenting traffic safety risk. Based on the traffic data, it was taken in consideration the necessity to make planning proposals and to develop design solutions immediately applicable, with minimum intervention. Solutions will refer to the geometric planning of the intersections, but with new plans and timings for traffic lights, including proposals for new equipment; regulating the traffic flow: development/ refurbishment of intersections and pedestrian crossings; optimization of routing programs in order to achieve a higher level of service and more efficient traffic control indicators; segregation of pedestrian movements by vehicles traffic, implementation of physical devices to lock / channel the traffic.

scholarly journals Portable Telematic System as an Effective Traffic Flow Management in Workzones

2015 ◽  
Vol 16 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Marek Ščerba ◽  
Tomáš Apeltauer ◽  
Jiří Apeltauer
Keyword(s):  
Traffic Flow ◽  
Traffic Safety ◽  
Traffic Control ◽  
Traffic Management ◽  
Traffic Accidents ◽  
Intelligent System ◽  
Economic Losses ◽  
Road Users ◽  
Traffic Flow Management ◽  
Negative Impacts

Abstract Traffic infrastructure localities with temporal restrictions for example due to reconstructions, or modernization, are important aspects influencing the traffic safety and traffic flow. On the basis of our research, we can identify main factors, which generate travel time loses, and which often cause traffic accidents in bottlenecks. First of all, it is improper late merge, speeding, tailgating, lower tolerance and consideration to other road users. Nervousness and ignorance of drivers also play an important role in generation of traffic congestions, lower level of service and resulting external economic loses. One of the tools eliminating the traffic restriction negative impacts is usage of portable telematics systems. In 2011 to 2013,project ViaZONE was in progress, which was to design an intelligent system with the aim to eliminate the mentioned risks and reduce economic losses generated by traffic congestions. Using available data and information, we have proved profitability and cost-effectiveness of dynamic systems for traffic control of work zones. Regarding traffic management, the system showed some problems due to indisciplined drivers and the system proved that speeding in these hazardous road segments is a common practice which caused accidents and congestions.

scholarly journals Left-Side On-Ramp Metering for Improving Safety and Efficiency in Underground Expressway Systems

2019 ◽  
Vol 11 (12) ◽  
pp. 3247 ◽  
Author(s):  
Minhua Shao ◽  
Congcong Xie ◽  
Lijun Sun ◽  
Xiaomin Wan ◽  
Zhang Chen
Keyword(s):  
Traffic Flow ◽  
Traffic Safety ◽  
Traffic Control ◽  
Flow Characteristics ◽  
Ramp Metering ◽  
Accident Risk ◽  
Data Traffic ◽  
Traffic Efficiency ◽  
Traffic Characteristics ◽  
Two Parameter

As one of the effective measures of intelligent traffic control, on-ramp metering is often used to improve the traffic efficiency of expressways. Existing on-ramp metering research mainly discusses expressways with right-side on-ramps. However, for underground expressway systems (UESs), left-side on-ramps are frequently adopted to reduce the ground space occupied by ramp construction. Since traffic entering from the left and right sides of the mainline may have different traffic characteristics, on-ramp metering for UESs with left-side on-ramps should be explored specifically. This study examines the impacts of left-side on-ramps on the traffic safety and efficiency of UESs and proposes an effective on-ramp metering strategy. Firstly, using field data, traffic flow fundamental diagrams and speed dispersion are discussed to explore the traffic flow characteristics of the “left-in” UES. The results show that the capacity and critical occupancy are both reduced in left-side on-ramp compared to right-side on-ramp expressways. Meanwhile, the speed dispersion is higher in left-side on-ramp UESs, which means a higher accident risk. Based on this, considering traffic safety and efficiency, a novel two-parameter left-side on-ramp metering strategy for UESs is proposed, in which occupancy and speed are used as the control indicators simultaneously. Additionally, the mechanism of the metering strategy is explained. Finally, the proposed on-ramp metering strategy is simulated on a real UES. The results demonstrate the advantages of the proposed two-parameter on-ramp metering strategy for improving the traffic safety and efficiency of UESs.

Functional structure of the subway train traffic control system complex

2021 ◽  
Vol 7 (3) ◽  
pp. 343-361
Author(s):  
E. O. Averchenkov ◽  
◽  
L. A. Baranov ◽  
M. A. Shevchenko ◽  
◽  
...  
Keyword(s):  
Energy Consumption ◽  
Remote Control ◽  
Control Systems ◽  
Traffic Safety ◽  
Traffic Control ◽  
Minimum Energy ◽  
Functional Structure ◽  
Normal Operation ◽  
Rolling Stock ◽  
Emergency Situations

The main architectural aspects of metro train traffic control systems are presented. The structure of train traffic control processes is presented with the example of the State Unitary Enterprise “Moscow Metro” and the main tasks that need to be solved to achieve high levels of automation of train traffic control in subways are described. A functional structure of a complex of metro train traffic control systems is presented, covering the levels of organization and planning of train traffic, operational traffic control and direct executive systems. The relationship between objects of automation and remote control of train movement, devices of the operational level and systems of organization and planning of movement are shown. The necessity of re-equipping the metro with means of ensuring transport safety and linking them with traffic control systems such as: means of informing passengers, providing the possibility of promptly informing passengers both during normal operation of the transport system and in case of emergency situations, means of communication “passenger – control center (situation center)” is shown. The latter ensures interaction between passengers and operational personnel of the subway, and if necessary, video surveillance equipment that provides enhanced remote control of the current situation in the interior of rolling stock cars and on platforms. The use of complex systems for controlling the movement of trains in subways increases the efficiency of their use by increasing the throughput and carrying capacity, accurate fulfillment of the traffic schedule and the possibility of its rapid recovery in case of failures. At the same time, traffic safety increases by reducing the likelihood of dangerous train convergence , and also the energy consumption for train traction is reduced due to the choice of energy-optimal train control modes and the optimal distribution of travel time along the line by the criterion of minimum energy consumption for the duration of travel along the tracks

Іnteroperability information-analytical system traffic safety assurance

2021 ◽  
Vol 13 (1) ◽  
pp. 149-154
Author(s):  
Oleksii Stepanov ◽  
◽  
Albina Venger ◽  
Volodymyr Kuzhel ◽  
◽  
...  
Keyword(s):  
Information And Communication Technologies ◽  
Traffic Safety ◽  
Traffic Control ◽  
Road Safety ◽  
Transport Process ◽  
Public Authorities ◽  
The Road ◽  
Route Network ◽  
Analytical System ◽  
Concept Of Information

The article was further developed by a topical issue, namely road safety. The concept of information and analytical system of road safety is developed. It is argued that information technology can reduce the distance between government and society through the principle of "feedback" and affect road safety. The paper proves that: first, the information-analytical system of road safety is designed to carry out information-analytical activities in order to obtain the information necessary to ensure the road safety. In particular, the inclusion of information and communication technologies with the potential to implement the principle of "feedback" is mandatory; secondly, the information and analytical system of road safety is planned to perform the following tasks: monitoring of road safety in the transport process, formation and optimization of a safe route network in the transport process, implementation of traffic control in the transport process, analyze data from road safety, acceptance of administrative decisions concerning traffic safety, etc. As a result - through the joint use of the collected information to increase the effectiveness of interagency cooperation on road safety in the transport process; thirdly, in order to perform the planned tasks of the information-analytical system, the road safety system must have the ability to interact and function with other systems without any restrictions, ie to have the property of interoperability. That is why the information and analytical system of road safety should include not only information and analytical units of all branches of government involved in the implementation of the concept of road safety, but also research organizations that analyze road safety. The interaction between them should be carried out by forming a single database of road safety. This will provide comprehensive support to public authorities in developing and adopting effective decisions governing road safety.

scholarly journals Increasing the traffic capacity of railway blocks

2018 ◽  
Vol 216 ◽  
pp. 02023 ◽  
Author(s):  
Boris Sergeev ◽  
Vitaly Dontsov ◽  
Boris Arzhannikov
Keyword(s):  
Traffic Safety ◽  
Traffic Control ◽  
System Analysis ◽  
Variable Number ◽  
Technical Solution ◽  
Signaling Systems ◽  
Safety Requirements ◽  
Traffic Capacity ◽  
Single Block ◽  
Control Devices

The paper considers ways of increasing the traffic capacity of railway sections equipped with automatic block signaling systems, with a discrete variable number of block sections. Simultaneous traffic of long and short trains on a single block is analyzed. The paper highlights shortcomings and limitations of the existing automatic block signaling systems, including low traffic capacity and non-compliance with traffic safety requirements for railway sections. The study is aimed at removing these shortcomings and limitations. For this purpose, a reasonable technical solution has been presented, analyzed and scientifically grounded. System analysis techniques have been used to study the performance of traffic control devices.

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