Evaluation of Road Design Elements Affecting Lateral Driving Safety under High-Speed Driving Conditions

2021 ◽  
Vol 23 (5) ◽  
pp. 69-79
Author(s):  
Aram Jung ◽  
Eunsol Cho ◽  
Jiyong Jang ◽  
Cheol Oh
Keyword(s):  
High Speed ◽  
Driving Safety ◽  
Design Elements ◽  
Road Design ◽  
Driving Conditions

scholarly journals Evaluation of Lateral Driving Safety for Elderly Drivers in High-Speed Curve Driving Conditions

2021 ◽  
Vol 39 (3) ◽  
pp. 280-298
Author(s):  
Aram JUNG ◽  
Jiyong JANG ◽  
Hyunjin PARK ◽  
Cheol OH
Keyword(s):  
High Speed ◽  
Driving Safety ◽  
Elderly Drivers ◽  
Driving Conditions

scholarly journals Overcoming the procedures for obtaining a location permit for the Podravska high-speed road project

2021 ◽  
Vol 3 (1) ◽  
pp. 060-071
Author(s):  
Bašić Marija ◽  
Kranjčić Nikola ◽  
Jug Jasmin ◽  
Đurin Bojan
Keyword(s):  
Environmental Impact ◽  
High Speed ◽  
Road Construction ◽  
Impact Study ◽  
Road Design ◽  
Preliminary Work ◽  
Complex Process ◽  
Road Project ◽  
Infrastructure Project ◽  
Environmental Impact Study

Roads are important infrastructure facilities that enable traffic accessibility, i.e. they improve the quality of transport communication between people, goods and innovations. The Podravina high-speed road project was designed with the aim of developing Podravina and Slavonia and enabling a better connection between them and the rest of Croatia. Road construction is a complex process that requires a location permit before construction begins. This paper is written with the aim of presenting in detail the process of obtaining a location permit, which is preceded by obligatory preliminary work. Its complexity depends on the type of a road, its purpose and characteristics of the area through which a planned road passes. The Podravina high-speed road is the largest infrastructure project in that part of Croatia and therefore detailed preliminary work is required. This paper describes some types of preliminary work which include geological, geomechanical and climatic tests. The paper presents a project justification study, an environmental impact study, an environmental impact study, a construction and a technical study as well as a spatial transport analysis. Based on the chosen Podravina high-speed road route, a general design was created by using a road design software program “Platea”.

scholarly journals METHODS FOR THE SCHEMATIZATION OF THE OPERATIONAL LOADING OF THE FREIGHT CAR

2021 ◽  
pp. 53-69
Author(s):  
О.М. Safronov ◽  
◽  
P.O. Khozia ◽  
Yu.Ya. Vodiannikov ◽  
V.S. Rechkalov ◽  
...  
Keyword(s):  
High Speed ◽  
Rolling Stock ◽  
Voltage Amplitude ◽  
Metal Fatigue ◽  
Design Elements ◽  
Real Process ◽  
Dynamic Voltage ◽  
Gradual Accumulation ◽  
Freight Car ◽  
Frequency Probability

The world trend, recently, is the creation of a high-speed cargo rolling stock for speeds with 160 km / h. In these condition, the durability of the structure of the cargo car are relevant. In the process of movement in the design of the car, voltages occur, variables in time. Under the action of alternating voltages in the design elements, the process of gradual accumulation of damage, leading to the formation of microscopic crack, and then to its development and subsequent sudden destruction - metal fatigue. One of the main properties of the wagon is the ability to withstand operational loads acting on it while maintaining this ability without destruction at all stages of the life cycle. The assessment of the bearing capacity is determined by the results of the undercarriage tests, the purpose of which is the definition and assessment of the reserve coefficient of fatigue resistance of the equivalent reduced amplitude of dy-namic stresses. As a rule, dynamic stresses are random due to the perturbing effect on the side of the rail path on the wheeled pairs, which are also random. Therefore, an important section of the study is the choice of methods for obtaining, processing and analyzing experimental data. Improving the reliability of test results is achieved by applying more advanced recording methods and processing results. To estimate the level of loading of the cargo car, methods are used based on the replacement of a real random process by some schematized process, which in terms of the accumulation of fatigue damage should be equivalent to a real process. Of the variety of schematics methods, two methods are distinguished - the method of complete cycles and the rain method, which most fully reflect the real process. The advantage of the "rain" method is the ability to process the process in real time. However, the algorithm of the "rain" method is quite complicated and does not allow processing large amounts of information. In this regard, the method of maximum discharges was proposed, which is a type of full cycles method and allows you to process an unlimited amount of information online. The schematic process is divided into classes - voltage amplitudes values. Depending on the distribution of voltage amplitudes in classes, the frequency (probability) of amplitude in the class is established. The reduced amplitude of the dynamic voltage is defined as the amount of products of the likelihood of entering each class on the average magnitude of the voltage amplitude in the class. Key words: cargo car, process, dynamic, voltage, amplitude.

scholarly journals The Concept of Development and Implementation of High-Speed Transport

2020 ◽  
Vol 18 (1) ◽  
pp. 58-72
Author(s):  
V. M. Alexeev ◽  
A. V. Vaganov ◽  
M. V. Katina
Keyword(s):  
High Speed ◽  
Magnetic Levitation ◽  
Transport Systems ◽  
Rolling Stock ◽  
Design Elements ◽  
Safety Issues ◽  
Current Collection ◽  
High Speeds ◽  
Technical Solutions ◽  
Original Approach

The article discusses the issues of implementation and organization of high-speed transport. The objective of the article is to consider possible options for implementing highspeed (HS) motion systems using the principle of magnetic levitation, which will ensure high speeds for delivery of goods and carrying people over long distances. To achieve this objective, it is necessary to develop an engine and technical solutions for design of HS rolling stock, make decisions on energy supply infrastructure and the HS track, address safety issues and new control systems considering the state of the infrastructure and its design elements. The article discusses several options for implementation of high-speed transport systems, differing in the power supply system, current collection and track based on the magnetic levitation approach. An original approach is proposed in implementation of magnetic levitation transport using the technology of electromagnetic guns designed to implement traction forces of a magnetic levitation vehicle. The advantage of this approach is that it opens the possibility of maneuvering for the vehicle while driving. This allows to abandon switch turnouts, now significantly limiting the use of magnetic levitation transport. A mathematical model describing interaction of an electromagnetic gun and supermagnets located on the track is considered. In constructing the model, methods of the theory of electromagnetic field and interaction of magnetic bodies were used, and when constructing a model of interaction of rolling stock with a magnetic track, methods of mathematical algebra and the Cauchy theorem were used. The article discusses various principles of organization of movement using the magnetic levitation for urban, suburban, and intercity transport.

Suspension Optimum Design Considering Tire and Vehicle Matching

2014 ◽  
Vol 496-500 ◽  
pp. 617-620
Author(s):  
Fan Bai ◽  
Kong Hui Guo ◽  
Dang Lu
Keyword(s):  
Optimum Design ◽  
Performance Index ◽  
High Speed ◽  
Objective Assessment ◽  
Driving Safety ◽  
Safety Index ◽  
Experiment Data ◽  
Evaluation Standards ◽  
Vehicle Handling ◽  
Running Performance

A method of suspension optimum design based on the tire and vehicle matching was introduced in this paper. Firstly, the vehicle handling stability evaluation standards considering tire matching with vehicle were determined by the subjective and objective assessment. Secondly, the quality, suspension kinematics and compliance characteristics and tire mechanics of prototype were tested. The vehicle model of prototype was built in Carsim with the corresponding experiment data. The model was verified by the results of the vehicle handling stability tests. Then a combination simulation platform was developed by making use of Isight, Matlab and Casim. Finally the optimal design of suspension kinematics and compliance characteristics and tire mechanics were conducted, taking straight running performance index, high-speed driving safety index and high-speed cornering performance index as the objective. The simulation results indicated that after optimization, the straight running performance and high-speed cornering performance of prototype could be improved.

scholarly journals ACCEL: Spreadsheet-Based Cost Estimation for Forest Road Construction

2011 ◽  
Vol 26 (4) ◽  
pp. 189-197 ◽  
Author(s):  
Jarel C. Bruce ◽  
Han-Sup Han ◽  
Abdullah E. Akay ◽  
Woodam Chung
Keyword(s):  
Cost Estimation ◽  
Road Construction ◽  
Microsoft Excel ◽  
Diagram Method ◽  
Forest Road ◽  
Design Elements ◽  
Road Design ◽  
Visual Basic For Applications ◽  
Site Characteristics ◽  
Forest Road Construction

Abstract A computer program has been developed to aid forest engineers in the cost estimation of forest road construction activities. This new tool, called ACCEL, uses Visual Basic for Applications within Microsoft Excel to compute the costs of construction components using interactive sheets, automated tasks, and advanced computer routines. The user is guided through road construction components and prompted for cost data, earthwork quantities, survey information, and the conditions of the construction environment to estimate total construction cost. Road design elements and site characteristics are variables used to optimize earthwork allocation, improving on using the mass diagram method. The program also estimates clearing and grubbing areas, rock surfacing volumes, and culvert lengths. ACCEL was validated by comparing the results to those of RoadEng (by Softree), ensuring that formulas were input correctly and showing close agreement in results. This program was created in a recognizable format, i.e., Microsoft Excel, and builds on basic quantity and cost estimation techniques. ACCEL is intended to improve the decisionmaking process for experienced forestry practitioners in forest road construction regardless of region, company, or agency affiliation by accepting their inputs and performing the calculations for different route alternative or varying design specifications.

Study on Decreasing Vibration of High-Speed Train Semi-Active Suspension System

2011 ◽  
Vol 230-232 ◽  
pp. 1104-1109
Author(s):  
Zhen Ping Fan ◽  
Heng Zeng ◽  
Jian Wei Yang ◽  
Jie Li
Keyword(s):  
Neural Network ◽  
Control Strategy ◽  
High Speed ◽  
Driving Safety ◽  
High Speed Train ◽  
Proportional Valve ◽  
Joint Simulation ◽  
The Neural Network ◽  
Adaptive Control Strategy ◽  
Active Damper

Lateral semi-active damper is designed by author based on the electro-hydraulic proportional valve, from the perspective angle of improving vehicle comfort; its purpose is to ensure vehicle driving safety. At the same time, the neural network adaptive control strategy is used for joint simulation of semi-active damper. The results show that lateral semi-active damper with the train body has significantly improved compared to the traditional passive lateral damper acceleration.

The impact of personality on driving safety among Chinese high-speed railway drivers

2016 ◽  
Vol 92 ◽  
pp. 9-14 ◽  
Author(s):  
Ming Guo ◽  
Wei Wei ◽  
Ganli Liao ◽  
Fulei Chu
Keyword(s):  
High Speed ◽  
Driving Safety ◽  
High Speed Railway ◽  
The Impact
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