scholarly journals Mathematical Modeling of the Route of Logging Roads

2021 ◽  
pp. 150-161
Author(s):  
Anton Borovlev ◽  
◽  
Alexey Skrypnikov ◽  
Vyacheslav Kozlov ◽  
Tatyana Tyurikova ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Transportation Network ◽  
Road Transport ◽  
Rate Of Change ◽  
Plane Curves ◽  
Flow Mode ◽  
Curvature Radius ◽  
Central Projections ◽  
The Road ◽  
Logging Roads

The implementation of tasks related to the development of the transportation network as a whole and logging roads as an integral part of it requires scientifically based theoretical studies of the patterns of formation of spatial curves when combining elements of the plan and the longitudinal profile, since the rational laying of the route for many years determines its most important transport and operational characteristics (speed, traffic safety, traffic capacity). Consideration of the visual perception of the road by the driver will improve the quality of design decisions, which will allow to avoid emergencies in the future after setting the route into service. On the other hand, a decrease in speed before seemingly sharp turns of the road affects the efficiency of logging road transport. Therefore, the view of the road ahead should strongly orient the driver, i.e. be visually clear and clearly changing, ensuring the constancy or smooth reduction of the traffic flow mode. At the same time, the need for a successful spatial solution of the road increases. In the designs of logging roads, straight lines, transition curves, described in recent years most often according to the clotoid, and circular curves are found as elements of the route plan. It is found that the road view in perspective correctly orients the driver of the car, i.e. it is visually clear, provided that the lines describing the edges of the roadway and the edges of the roadway in the perspective image are curved in the same direction as in the road plan. The purpose of the work is to determine a set of quantitative indicators (curvature, radius of the curve in the plan, maximum curvature, maximum rate of change of curvature) for optimization of the visual smoothness and clarity of the central projections of elementary spatial and plane curves. The performed studies allow us to fully characterize the visual smoothness and clarity of the central projections of elementary spatial and plane curves. The above algorithm makes it possible to compile a computer program to determine the mentioned indicators. The indicators determined by this algorithm allow us to evaluate both the visual smoothness and clarity of curves on logging roads.

scholarly journals Road Transport Accidents in Nigeria and the Role of Automotive Active Safety System

2016 ◽  
Vol 11 (1) ◽  
pp. 49-54
Author(s):  
Olasunkanmi Oriola Akinyemi ◽  
Hezekiah O Adeyemi ◽  
Olusegun Jinadu
Keyword(s):  
Traffic Safety ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Transportation Network ◽  
Road Transport ◽  
Road Accident ◽  
Active Safety ◽  
Road Accidents ◽  
Road Transportation ◽  
Road Traffic Safety

Abstract Analysis of road traffic accidents revealed that most accidents are as a result of drivers’ errors. Over the years, active safety systems (ASS) were devised in vehicle to reduce the high level of road accidents, caused by human errors, leading to death and injuries. This study however evaluated the impacts of ASS inclusions into vehicles in Nigeria road transportation network. The objectives was to measure how ASS contributed to making driving safer and enhanced transport safety. Road accident data were collected, for a period of eleven years, from Lagos State Ministry of Economic Planning and Budget, Central Office of Statistics. Quantitative analysis of the retrospective accident was conducted by computing the proportion of yearly number of vehicles involved in road accident to the total number of vehicles for each year. Results of the analysis showed that the proportion of vehicles involved in road accidents decreased from 16 in 1996 to 0.89 in 2006, the injured persons reduced from 15.58 in 1998 to 0.3 in 2006 and the death rate diminished from 4.45 in 1998 to 0.1 in 2006. These represented 94.4 %, 95 % and 95 % improvement respectively on road traffic safety. It can therefore be concluded that the inclusions of ASS into design of modern vehicles had improved road safety in Nigeria automotive industry.

scholarly journals Modeling the Complexity of Road Accidents Prevention

2020 ◽  
Vol 9 (2) ◽  
pp. 24-41
Author(s):  
Alex Kizito ◽  
Agnes Rwashana Semwanga
Keyword(s):  
Traffic Safety ◽  
Police Officers ◽  
Road Transport ◽  
Road Accident ◽  
Road Accidents ◽  
Dynamic Interactions ◽  
The Road ◽  
Dynamic Synthesis ◽  
Road Users ◽  
Synthesis Methodology

Simplistic representations of traffic safety disregard the dynamic interactions between the components of the road transport system (RTS). The resultant road accident (RA) preventive measures are consequently focused almost solely on individual/team failures at the sharp end of the RTS (mainly the road users). The RTS is complex and therefore cannot be easily understood by studying the system parts in isolation. The study modeled the occurrence of road accidents in Uganda using the dynamic synthesis methodology (DSM). This article presents the work done in the first three stages of the DSM. Data was collected from various stakeholders including road users, traffic police officers, road users, and road constructors. The study focused on RA prevention by considering the linear and non-linear interactions of the variables during the pre-crash phase. Qualitative models were developed and from these, key leverage points that could possibly lower the road accident incidences demonstrating the need for a shared system wide responsibility for road safety at all levels are suggested.

scholarly journals An Analysis of Traffic Conflicts as a Tool for Sustainable Road Transport

2020 ◽  
Vol 12 (17) ◽  
pp. 7198
Author(s):  
Vladislav Krivda ◽  
Jan Petru ◽  
David Macha ◽  
Kristyna Plocova ◽  
David Fibich
Keyword(s):  
Traffic Safety ◽  
Road Transport ◽  
European Countries ◽  
Road User ◽  
Correct Identification ◽  
Sustainable Transport ◽  
Main Hypothesis ◽  
The Road ◽  
Traffic Conflicts ◽  
Selection Of

This paper presents an approach to partially solving an issue within the scope of sustainable road transport, specifically the issue of potential accidents, i.e., traffic conflicts. First, a method is introduced for the analysis of traffic conflicts using video equipment. The attention is focused on traffic conflicts that occur at turbo-roundabouts. Given the diversity of causes of traffic conflicts, the emphasis is placed on the correct identification of the cause, i.e., whether the conflict is caused only by the negligence of the road user, or whether the conflict is more or less influenced by an inappropriately designed turbo-roundabout or one or more of its specific building elements (e.g., unsuitable corner radius). The next part of the article presents a selection of results that were obtained from analyses performed at about 100 turbo-roundabouts in nine European countries. Illustrative diagrams show the courses of the emergence of traffic conflicts, the causes of which are then described in detail. The conclusions from these analyses confirm the main hypothesis that the evaluation of traffic conflicts should be an essential part of designing roads, in order to increase traffic safety and, importantly, contribute to sustainable transport.

scholarly journals A stress-strain state analysis of the road transport works foundations on seasonally freezing soils

2020 ◽  
Vol 7 (4) ◽  
Author(s):  
Anatoliy Permikin ◽  
Igor Ovchinnikov ◽  
Anastasiya Gricuk
Keyword(s):  
Traffic Safety ◽  
Road Transport ◽  
Transport Infrastructure ◽  
Fine Aggregate ◽  
Negative Consequences ◽  
Soil Thickness ◽  
The Road ◽  
Operational Characteristics ◽  
On The Road ◽  
Frost Boil

This article discusses the road transport works foundations when they are located in the seasonally freezing soils zone. Some culvert aqueduct utilized structures were considered and analyzed as an example, in the scope of most common structures on the road network and that also has an insignificant weight. Some constructive solutions disadvantages of these pipes were pointed out. It is noted that the operational characteristics of nonfrost-susceptible soil decrease in the watercourse filtering process and settling small particles and reported the dependence of the relative soil frost boil on the fine aggregate percentage. As an example of the frost boil forces influence, a typical culvert aqueduct design is considered. The calculation of axial and tangential heaving forces that affect the crown of tube is performed, assuming that the bedding soil is contaminated. Based on the calculation, rise calculated value dependence graphs of the unstressed base on the soil dampness and the heaving soil thickness, and the heaving pressure on the soil dampness are presented here. Due to the insufficient value of the forces holding back against lifting, possible negative consequences of the frost boil impact forces are presented, this affects not only the culvert aqueduct operational characteristics but also the roadbed smoothness and traffic safety. Thus, the need for additional measures to prevent soil swelling under the pipe head is justified. Recommended measures to prevent excessive deformations during frost boil, as well as modern aspects of the development of such technologies, are considered. Conclusions are made about their applicability and feasibility in relation to small artificial structures of transport infrastructure.

scholarly journals ENGINEERING SOLUTIONS OF TRAFFIC SAFETY PROBLEMS OF ROAD TRANSPORT

Transport ◽  
2004 ◽  
Vol 19 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Marijonas Bogdevičius ◽  
Olegas Prentkovskis ◽  
Oleg Vladimirov
Keyword(s):  
Traffic Safety ◽  
Motor Vehicle ◽  
Initial Conditions ◽  
Road Transport ◽  
Brake System ◽  
The Road ◽  
Movement Trajectories ◽  
Hydraulic Brake ◽  
Road Section ◽  
Vehicle Movement

The authors of this paper focus on the simulation of the motor vehicle movement (taking into consideration motor vehicle dynamics, motor vehicle hydraulic brake system influence on motor vehicle movement, interaction between its wheels with road pavements, road guardrail characteristics, interaction between motor vehicle and road guardrail) on a certain road section and propose their specific solution of this problem. The presented results, illustrating the motor vehicle movement trajectories (motor vehicle braking and interaction between motor vehicle and road guardrail at various initial conditions and at various certain pavement surface of the road section under investigation) and work of a motor vehicle hydraulic brake system. Taking into consideration the presented general mathematical model and computer aided test results it is possible to investigate various road transport traffic situations as well as to investigate various transport traffic safety problems.

scholarly journals Assessment of Tire Features for Modeling Vehicle Stability in Case of Vertical Road Excitation

2021 ◽  
Vol 11 (14) ◽  
pp. 6608
Author(s):  
Vaidas Lukoševičius ◽  
Rolandas Makaras ◽  
Andrius Dargužis
Keyword(s):  
Traffic Safety ◽  
Road Transport ◽  
Vehicle Stability ◽  
The Road ◽  
Directional Stability ◽  
Road Pavement ◽  
Road Excitation ◽  
On The Road ◽  
Materials Used ◽  
The Impact

Two trends could be observed in the evolution of road transport. First, with the traffic becoming increasingly intensive, the motor road infrastructure is developed; more advanced, greater quality, and more durable materials are used; and pavement laying and repair techniques are improved continuously. The continued growth in the number of vehicles on the road is accompanied by the ongoing improvement of the vehicle design with the view towards greater vehicle controllability as the key traffic safety factor. The change has covered a series of vehicle systems. The tire structure and materials used are subject to continuous improvements in order to provide the maximum possible grip with the road pavement. New solutions in the improvement of the suspension and driving systems are explored. Nonetheless, inevitable controversies have been encountered, primarily, in the efforts to combine riding comfort and vehicle controllability. Practice shows that these systems perform to a satisfactory degree only on good quality roads, as they have been designed specifically for the latter. This could be the cause of the more complicated car control and accidents on the lower-quality roads. Road ruts and local unevenness that impair car stability and traffic safety are not avoided even on the trunk roads. In this work, we investigated the conditions for directional stability, the influence of road and vehicle parameters on the directional stability of the vehicle, and developed recommendations for the road and vehicle control systems to combine to ensure traffic safety. We have developed a refined dynamic model of vehicle stability that evaluates the influence of tire tread and suspensions. The obtained results allow a more accurate assessment of the impact of the road roughness and vehicle suspension and body movements on vehicle stability and the development of recommendations for the safe movement down the road of known characteristics.

scholarly journals LATEST ASSESSMENT OF TRAFFIC CONDITIONS ON ROADS «TRIAD OF TRAFFIC»

2021 ◽  
Vol 1 (48) ◽  
pp. 166-177
Author(s):  
Lanovoy O ◽  
◽  
Kyselov V ◽  
Vyhovska I ◽  
◽  
...  
Keyword(s):  
Transport System ◽  
Traffic Safety ◽  
Road Transport ◽  
Traffic Flows ◽  
Transport Costs ◽  
The Road ◽  
Traffic Conditions ◽  
Road Users ◽  
Highway Network ◽  
Rational Management

The article explores the driving conditions for determining the demand of drivers of vehicles for the movement of roads, the road conditions of which should ensure this demand. The object of the study is automobile international and national transport corridors. When optimizing the management of the complex transport system «International, national and local traffic flows - Automotive International and National Transport Corridors» (MNMTP-AMNTC) can be sought to achieve different goals (criteria of optimality), and, depending on these goals, consider the different tasks of optimal management. On road transport, including in this concept of the system of communication routes (highways), the following tasks are the most important: ensuring the least time of communication at limited road costs; - ensuring the specified time of communication at the lowest road costs; - ensuring the lowest transport costs at a limited level of road costs; - ensuring the lowest road costs at a limited level of transport costs; - ensuring the maximum possible level of traffic safety at a limited level of road costs; - ensuring the required level of traffic safety at the lowest road costs; to achieve a minimum of road costs, provided that the specified volume of traffic (traffic), the specified speed and the necessary safety of traffic; ensuring maximum road capacity at a limited level of road costs. According to its parameters, the MMMTP-AMNTC refers to complex systems, the main characteristics of which are: efficiency indicator; stability; obstruction; Reliability. The newest approach of the «Traffic Triad» will allow to evaluate the functioning and ensure the rational management of any transport system with a focus on meeting the needs of users of highways - road users. KEYWORDS: HIGHWAY NETWORK, INTERNATIONAL, NATIONAL AND LOCAL TRAFFIC FLOWS, ROAD INTERNATIONAL AND NATIONAL TRANSPORT CORRIDORS.

scholarly journals The importance of traffic light signaling for improvement of road transport safety aspects

2018 ◽  
Vol 19 (6) ◽  
pp. 249-256
Author(s):  
Katarzyna Sosik ◽  
Stanisław Iwan
Keyword(s):  
Transport System ◽  
Traffic Safety ◽  
Road Safety ◽  
Road Traffic ◽  
Negative Impact ◽  
Modern Society ◽  
Road Transport ◽  
Traffic Light ◽  
Negative Effects ◽  
The Road

Undertaking the subject of the application of telematic systems to improve the safety of road transport is caused by the increase of the mobility of the society, their transport needs, which in effect leads to the multiplication of the number of vehicles on the roads. The low level of construction of new roads and modernization of the existing ones is conducive to the occurrence of transport congestion, the number of accidents and road traffic difficulties, and has a negative impact on the natural environment. In the era of modern society, methods are sought that would minimize negative effects in the transport system, thereby increasing road safety. The purpose of this article is to analyse the use of Intelligent Traffic Light in the aspect of road safety. Traffic safety at intersections is reflected in indicators of dangerous situations with the participation of road users in its area. Hence, the selection of the research method and the place of the tests carried out. Implementation of telematic systems supports the construction of a secure road transport network. The authors of the article focused on the analysis of traffic hazards and their consequences in the form of wounded and dead people. In addition, the topic of safety in the road transport system was addressed very precisely, where it was discussed in terms of operation, economic, technical and environmental protection.

The Influence on the Consumption Level of Tibetans

2014 ◽  
Vol 1042 ◽  
pp. 261-265
Author(s):  
Shu Te Liu ◽  
Hua Liu ◽  
Guo Liang Long
Keyword(s):  
Central Government ◽  
Transportation Network ◽  
Road Transport ◽  
Civil Aviation ◽  
Living Standard ◽  
Urban Residents ◽  
Consumption Level ◽  
The Road ◽  
Freight Volume ◽  
The Impact

Transportation is the accelerator in the development of regional economy. Since the peaceful liberation of Tibet in 1951, central government has invested heavily to Tibet on the construction of civil aviation, highway and rail transportation network system, which promotes the circulation of people and goods between Tibet and outside world. Tibet’s economy has developed fast after the improvement of transportation, and people’s living standard has also been raised vastly. By researching in the history and current situation of people’s consumption level and transportation condition in Tibet, the thesis established in Tibet road transport for urban residents and farmers and herdsmen affect the level of consumption and other economic models. Results show that Tibet road transport impact to the influence of the urban residents consumption level is greater than the impact on the farmers and herdsmen consumption level, and the main factors influencing the road freight volume by empirical analysis conclusion.

SAFETY IN TRANSPORT OF PERSONS AND GOODS IN POLAND

2017 ◽  
Vol 186 (4) ◽  
pp. 302-312
Author(s):  
Tomasz SMAL ◽  
Robert MALINOWSKI
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Road Transport ◽  
Special Treatment ◽  
The Road ◽  
Road Traffic Safety ◽  
Dangerous Goods ◽  
International Regulations ◽  
The Media ◽  
Transport Of Dangerous Goods

The problem of road safety is an important problem that accompanies mankind from the very beginning of the development of communication. Based on the statistics, the article presents the analysis of road traffic safety in our country over the past few years and shows how it shapes compared to other European Union countries. The main reasons, which lie behind the situation, are also identified as well as the ways and directions of actions that are taken to minimize the effects of road accidents. The pace of reduction of the number of fatalities and injured on Polish roads is still unsatisfactory and therefore far-reaching measures to counteract such a situation have to be taken. These steps are based on normative provisions and long-term actions supported by the media and various types of advertising campaigns. The article also presents the issues related to the road transport of dangerous goods, which, due to the specific nature of the cargo carried, is subjected to special treatment and governed by international regulations and arrangements under the ADR Agreement.

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