Functional tests of the ETCS and rail traffic control systems

2021 ◽  
Vol 133 ◽  
pp. 15-26
Author(s):  
Paweł Drózd ◽  
Adam Rosiński
Keyword(s):  
Traffic Control ◽  
Functional Model ◽  
Field Tests ◽  
Base Layer ◽  
Initial State ◽  
Railway Traffic ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Cost ◽  
The Impact

The paper presents the issues of railway traffic control devices testing and focuses on European Train Control System (ETCS) devices widely implemented in railways. The functions of the ETCS system, principles of operation are described. The basic telegrams transmitted in the track-to-train relation are listed. The process of designing and verifying the implemented data and what parameters are checked at the stage of field tests using the locomotive is briefly described. The functional model of the SRK devices, including ETCS elements, was presented, and the close relationship between the base layer of the railway traffic control devices and the ETCS was shown. Equipment testing reduces the availability of the rail network, engages staff, and generates costs. A test generation method is presented to minimize the impact. Two indicators are proposed for reducing the set of checks, the cost of checking and the information effectiveness. The cost of checking due to the problematic estimate is generalized, divided into three groups taking into account the difficulty and resource consumption of bringing the devices to the initial state and their operation according to the test. Therefore, the obtained set of checks is suboptimal and ensures complete coverage of the functions with tests, which is essential when testing devices. The tests are carried out using available setting commands and the implementation of tasks - entry and exit routes at the station. The proposed method is universal and can be applied to any railway traffic control device, regardless of the manufacturing technology. It is a non-invasive method in the structure of the tested devices and does not require additional hardware resources.

Some aspects of project management in terms of design automation for railway traffic control devices

2018 ◽  
Vol 121 ◽  
pp. 411-421
Author(s):  
Paweł Wontorski ◽  
Andrzej Kochan
Keyword(s):  
Project Management ◽  
Traffic Control ◽  
Design Automation ◽  
Graphical Form ◽  
Project Management System ◽  
Railway Traffic ◽  
Selection Of Variables ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Impact

The article presents the concept of integration system of design automation and system of project management. A model was developed cooperation between the two systems on several levels, based on continuous monitoring of the design process and comparing the assumed values of the selected parameters from the actual values. The selection of variables transmitted based on the assumption of cooperation project management system with the system of design automation for railway traffic control devices, designed to support of designers. Due to the nature of projects for railway traffic control devices drew attention to the quality control of the project in the context of the safety and reliability of railway traffic control system, the impact of deviations from the schedule to the railway timetable, version compatibility, and changes in the chamfering work on objects with continuous rail traffic. The structure of the model is presented in graphical form.

scholarly journals Functional Testing of Railway Traffic Control Device

2020 ◽  
Vol 64 (186) ◽  
pp. 91-96
Author(s):  
Paweł Drózd ◽  
Adam Rosiński ◽  
Lech Konopiński
Keyword(s):  
Traffic Control ◽  
Control Device ◽  
Functional Testing ◽  
Functional Tests ◽  
Railway Traffic ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Impact ◽  
Diagnostic Properties

The article presents the problems of functional tests of railway traffic control devices. The purpose and scope of the tests as well as the impact of testing on the SRK devices are presented. The methodology of selecting tests depending on the scope of research is proposed. For this purpose, the SRK devices were analyzed for functional and diagnostic properties. Keywords: functional tests, railway traffic control devices, tests

Effect of Pedestrian-Related Factors on Intersection Performance

2005 ◽  
Vol 1920 (1) ◽  
pp. 65-73
Author(s):  
Hoe Kyoung Kim ◽  
Michael P. Hunter
Keyword(s):  
Traffic Control ◽  
National Standard ◽  
Related Factors ◽  
Minimal Impact ◽  
Traffic Lane ◽  
Cycle Lengths ◽  
Control Devices ◽  
Traffic Control Devices ◽  
Walking Speeds ◽  
The Impact

The Manual on Uniform Traffic Control Devices (MUTCD) contains the national standard for installing and maintaining traffic control devices on all streets and highways. The 2003 MUTCD contains numerous corrections, revisions, and updates to the millennium edition (2000). One update is related to the definition of crossing distance at signalized intersections, where the crossing distance is extended to the far-side curb rather than the center of the farthest traffic lane. This study investigated the sensitivity of intersection performance to crossing distance and walking speed, critical constraints in the determination of the minimum green time. Three crossing distance standards and four walking speeds are considered. With Highway Capacity Manual (HCM) procedures, the impacts of the given crossing distance definitions and walking speeds on intersection operations were tested on two intersection configurations over a range of cycle lengths and traffic volumes. The effect on intersection performance was found to be most significant at low cycle lengths, in some instances with the delay increased manyfold. However, when cycle lengths were increased to account for the pedestrian constraints, optimal delay rarely increased by more than a few seconds. Additionally, as the discrepancy between the critical lane traffic volume on the main and cross streets was increased, the impact of pedestrian green times on vehicle delay also increased. It was seen that as the cycle length increased, pedestrian minimum green times no longer governed, so the impact of pedestrians on intersection performance became increasingly insignificant, often with a minimal impact on the optimal performance.

Crash Testing and Evaluation of Work Zone Traffic Control Devices

1998 ◽  
Vol 1650 (1) ◽  
pp. 45-54 ◽  
Author(s):  
King K. Mak ◽  
Roger P. Bligh ◽  
Lewis R. Rhodes
Keyword(s):  
Traffic Control ◽  
Evaluation Criteria ◽  
Work Zone ◽  
Work Zones ◽  
Impact Performance ◽  
Crash Testing ◽  
Control Devices ◽  
Traffic Control Devices ◽  
Under Construction ◽  
The Impact

Safety of work zones is a major area of concern since it is not always possible to maintain a level of safety comparable to that of a normal highway not under construction. Proper traffic control is critical to the safety of work zones. However, traffic control devices themselves may pose a safety hazard when impacted by errant vehicles. The impact performance of many work zone traffic control devices is mostly unknown, and little, if any, crash testing has been conducted in accordance with guidelines set forth in NCHRP Report 350. The Texas Department of Transportation (TxDOT) has, in recent years, sponsored a number of studies at the Texas Transportation Institute to assess the impact performance of various work zone traffic control devices, including plastic drums and sign substrates, temporary and portable sign supports, plastic cones, vertical panels, and barricades. The results, findings, conclusions, and recommendations are presented for temporary and portable sign supports, plastic drums, sign substrates for use with plastic drums, traffic cones, and vertical panels, whereas those for barricades are covered elsewhere. Most of the work zone traffic control devices satisfactorily met the evaluation criteria set forth in NCHRP Report 350 and are recommended for field implementation. However, some of the devices failed to perform satisfactorily and are not recommended for field applications. The results from these studies are being incorporated into the TxDOT barricade and construction standard sheets for use in work zones.

scholarly journals Modeling of the operation of the reserve source of electric energy of railway traffic control devices

2018 ◽  
Vol 19 (12) ◽  
pp. 579-584
Author(s):  
Piotr Osa ◽  
Jerzy Wojciechowski ◽  
Marek Wójtowicz ◽  
Nikolai Osmolovskii
Keyword(s):  
Simulation Model ◽  
Traffic Control ◽  
Electric Energy ◽  
Power Source ◽  
Operating Conditions ◽  
Basic Part ◽  
Railway Traffic ◽  
Control Devices ◽  
Traffic Control Devices

The article presents issues related to the problem of modeling the work of a reserve source of electric energy for railway traffic control devices. The problems of srk devices and the construction and concept of powering them into electricity were outlined. The basic part presents a simulation model of the operation of a generator set, used as a reserve power source. Modifications of the model to work in the most important operating conditions are shown. The results of simulation calculations are presented.

scholarly journals Crash Testing and Analysis of Work-Zone Sign Supports

2002 ◽  
Vol 1797 (1) ◽  
pp. 96-104 ◽  
Author(s):  
Karla A. Polivka ◽  
Ronald K. Faller ◽  
John R. Rohde ◽  
Dean L. Sicking
Keyword(s):  
Traffic Control ◽  
Work Zone ◽  
Work Zones ◽  
Design Elements ◽  
Impact Performance ◽  
Crash Testing ◽  
Control Devices ◽  
Traffic Control Devices ◽  
The Impact ◽  
Fundamental Design

A variety of traffic-controlling devices are used in work zones; some of these are not normally found on the roadside or in the traveled way outside of the work zones. These devices are used to enhance the safety of the work zones by controlling the traffic through these areas. Because of the placement of the traffic control devices, the devices themselves may be potentially hazardous to both workers and errant vehicles. The impact performance of many work-zone traffic control devices is mainly unknown, and to date limited crash testing has been conducted under the criteria of NCHRP Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features. The results of full-scale crash testing of flexible panel work-zone sign stands were evaluated and analyzed to quantify the features that successful devices shared, as well as common features of those devices that failed salient safety criteria. Parameters considered included sign base and upright properties, sign height, cross-member properties, and ancillary details. Results pointed to three problematic, fundamental design issues: ( a) combinations of base and upright stiffness and strength that generally lead to significant windshield damage, ( b) cross members that lead to windshield damage in the end-on (90°) impact orientation, and ( c) appurtenances that have an impact on performance. Although there are a significant number of variables that control the performance of a given device, these generalizations offer a basis for the evaluation of the fundamental design elements.

scholarly journals Adaptation of the PKP PLK S.A. Train Light Signaling to Higher Number of Signal Aspects

2020 ◽  
Vol 64 (186) ◽  
pp. 75-82
Author(s):  
Marek Bartczak
Keyword(s):  
Traffic Control ◽  
Light Signaling ◽  
Signaling System ◽  
Traffic Light ◽  
Yellow Light ◽  
Railway Traffic ◽  
Transmission Of Information ◽  
Control Devices ◽  
Light Signals ◽  
Traffic Control Devices

The article discusses the train signaling system developed in OSŻD. The traffic light signaling currently used on the network managed by PKP Polskie Linie Kolejowe S.A. (Polish Railway Lines) is also described. A proposal of traffic light signals is presented, enabling the transmission of information on travel speeds on the turning tracks of turnouts operated on the PKP PLK S.A. network. The proposed signaling has been developed based on OSŻD (in Rus. Организация со-трудничества железных дорог – ОСЖД) signaling. The number of signals needed was obtained by introducing a second yellow light strip and optionally two different flashing frequencies. Keywords: railway signaling, signaling for trains, lineside signals, railway traffic control devices

scholarly journals Support making decisions in the exploitation process of railway traffic control devices

2018 ◽  
Vol 19 (12) ◽  
pp. 459-463
Author(s):  
Mieczysław Kornaszewski
Keyword(s):  
Decision Making ◽  
Traffic Control ◽  
Safety Requirements ◽  
Railway Traffic ◽  
Effective Implementation ◽  
Rational Decision Making ◽  
Operation Process ◽  
Control Devices ◽  
Traffic Control Devices ◽  
And Control

The increasing safety requirements for the railway traffic control devices cause that the issue of rational decision making in the management of applied devices operation process become more and more important. The management includes activities necessary for the effective implementation of the operation process and also the ability to the action purpose clarification, the necessary resources preparation, the work plan arrangement and control of their implementation. The implementation each of the indicated functions requires a decision making complicated from a human.

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