Strength of the semitrailer’s roof in the aspect of road traffic safety

2018 ◽  
Vol 121 ◽  
pp. 285-293
Author(s):  
Mirosław Nader ◽  
Krzysztof Kielczyk
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Test Methods ◽  
Point Of View ◽  
Road Vehicles ◽  
The Road ◽  
Road Traffic Safety ◽  
Road Users ◽  
Minimum Requirements ◽  
European Standards

Stable and slidable roofs of the semitrailers are usually characterized by low weight and easy handling, which equals directly into comfort of use, longevity of the system and the time needed to open or close. However, not always an operational advantages of roofs go hand in hand with their durability, especially in the snowfall situation or sudden changes of the road lane by a set of vehicles: a truck tractor – a semitrailer. The analysis of homologation regulations shows that today there are no precise requirements and physical testing / strength methods for assembled roofs of the semitrailers as components. The test methods for complete vehicle bodies (including the roof), which have destructive nature, are described in European standards, e.g. EN 12642:2017 "Securing of cargo on road vehicles – Body structure of commercial vehicles – Minimum requirements" [6], internal German regulations, e.g. VDI 2700:2004 "Securing of loads on road vehicles" [8] or Directive DCE 9.5:2008 ”Load security for transportation of load containers on utility vehicles in road traffic” [7]. A non-destructive, possible to perform, testing method for the roof as a component - is calculation method. The results of the performed tests allow to conduct development works over improving the vehicle’s system security (including the introduction of new semitrailers roofs design solutions and verification of existing ones). The carried out strength tests give possibilities to optimize and adapt the roofs to the transported loads, e.g. stable lifting roofs used in transport of divisible loads, or sliding roofs used in the transport of non-separate loads. The strength testing of the semitrailer’s roofs is highly justified from the point of view of securing the load and safety of passengers, drivers and other road users primarily. The requirements and limitations of the mentioned testing methods are not - in the authors opinion - 100% of realistic and possible deformation during the real vehicle’s road traffic. On the other hand, the cited documents exists as recognized regulators in the international arena of the road traffic legislation. The work’s aim is demonstrating the benefits of using reinforced roofs in all types of the semitrailer’s bodyworks.

scholarly journals Selected Problems of Transport in Port Towns – Tri-City as an Example

2017 ◽  
Vol 24 (s1) ◽  
pp. 16-24 ◽  
Author(s):  
Marcin Budzyński ◽  
Dawid Ryś ◽  
Wojciech Kustra
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Point Of View ◽  
Road Surface ◽  
Air Transport ◽  
Transport Systems ◽  
Sea Transport ◽  
The Road ◽  
Road Traffic Safety ◽  
Transport Problems

Abstract Port towns are strategic places from the point of view of transport systems. They form integration junctions for various transport branches , apart from the traditional - road and railway ones , also for water( sea) transport which is active there. Moreover, air transport comes also into consideration , whose efficient functioning must be connected with good accessibility, that concerns sea transport as well. Efficient and safe servicing the ports is crucial for their functioning. Problems associated with the overloading of lorries, which leads to degradation of road surface structure , observed in Gdynia, are discussed as an example in this paper. Problems of road traffic safety (RTS) are presented in this paper on the example of Gdańsk. The two issues: the road traffic safety and road surface degradation constitute only some transport problems of port towns , but they are very important, from the point of view of their specificity, for integration junctions of all the transport branches for people and goods. However, in discussing selected aspects of transport in port towns it is necessary to refer to the managing of integrated transport system with taking into account its traffic safety aspects.

scholarly journals Traffic Calming Measures: An Evaluation of the Effect on Driving Speed

2017 ◽  
Vol 29 (3) ◽  
pp. 275-285 ◽  
Author(s):  
Audrius Vaitkus ◽  
Donatas Čygas ◽  
Vilma Jasiūnienė ◽  
Laura Jateikienė ◽  
Tadas Andriejauskas ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Control Measures ◽  
Road Accidents ◽  
The Road ◽  
Road Traffic Safety ◽  
Traffic Calming ◽  
Road Users ◽  
Accident Probability ◽  
Driving Speed

Road accidents are one of the leading causes of death in the world, particularly among young people. Excessive speed is one of the main risk factors in road traffic safety, increasing accident probability and affecting accident severity. Experimental research of the traffic calming measures allocation effect on the driving speed is presented in this paper. The research has been carried out on two aspects. The first one with respect to the mean speed and the second one regarding instantaneous speed. However, the paper is not only restricted by the above research. Standardized survey interview and questioning, a survey of public opinion, was carried out to find out the road users’ opinions about the need for traffic calming measures and speed control measures. Finally, the authors presented their insights and recommendations for the installation of speed humps and gateways and their optimum spacing.

Review of methods applied to research of road users behaviour on pedestrian crossings

2018 ◽  
Vol 121 ◽  
pp. 431-439
Author(s):  
Anna Wytrykowska ◽  
Piotr Tomczuk
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Road Traffic ◽  
Technical Condition ◽  
Transport Systems ◽  
Systematic Research ◽  
Road Infrastructure ◽  
The Road ◽  
Road Traffic Safety ◽  
Road Users

Increase in the interest of road safety and threats has influenced the promotion of research conducted in this area. When conducting the analysis of hazards in road traffic, special attention should be paid to the technical condition of the vehicle, the condition of the road infrastructure, the surroundings and the accessibility of the road and the behavior of road traffic participants. Road managers have the opportunity to influence the level of road safety directly, through the modernization and reconstruction of road infrastructure. In order to select effective solutions, it is necessary to conduct systematic research on the level of road traffic safety, accident rates and the effectiveness of implemented solutions. An example of the conducted research are the analysis of traffic participants' behavior. The paper presents an overview of the methods used to study the behavior of road users. One of the presented methods was developed and used as part of the Rector's Grant in 2017 by the Scientific Circle of Electrical Engineering in Transport Systems.

scholarly journals Bike-sharing as a possibility to support Vision Zero

2018 ◽  
Vol 231 ◽  
pp. 03005 ◽  
Author(s):  
Katarzyna Turoń ◽  
Grzegorz Sierpiński
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
The United States ◽  
Vulnerable Groups ◽  
The Road ◽  
Bicycle Safety ◽  
Road Traffic Safety ◽  
Road Users ◽  
Bike Sharing ◽  
Vision Zero

Cyclists as unprotected road users are one of the most vulnerable groups of travelers. In order to improve their safety, various activities are carried out. Interested results are presented in Mineta Transportation Institute (MTI) report - Report 12-54: Bike-sharing and Bicycle Safety from 2016. It points out that there are no fatalities among users of city bike sharing systems in the United States. Due to the growing interest in systems in Poland, authors focused on the analysis of aspects related to the safety of their use. The paper presents factors that affect the road traffic safety of bike-sharing users. Authors referred to international practices used in cities bike-sharing systems and presented bike-sharing systems as an opportunity to support the implementation of Vision Zero.

scholarly journals An example of a power-off maneuver of a vehicle without a straight line motion control

2021 ◽  
Vol 58 (2) ◽  
pp. 63-80
Author(s):  
Jerzy Kisilowski ◽  
Jarosław Zalewski
Keyword(s):  
Motion Control ◽  
Traffic Safety ◽  
Motor Vehicle ◽  
Road Traffic ◽  
Maximum Amplitude ◽  
Point Of View ◽  
The Road ◽  
Road Traffic Safety ◽  
Safety Research ◽  
Straight Line

In this paper some selected results related to motor vehicle dynamics have been presented basing on the computer simulations of a sports two-seater performing a power-off straight line maneuver with different road conditions and the lack of a straight-line motion control having been included. All simulations have been performed in the MSC Ad-ams/Car environment and the adopted maneuver was performed at the instant speed of 100km∙h-1. The selected phe-nomena have therefore been observed along the road long enough to relate them to different aspects of vehicle dynam-ics and the road traffic safety research. The adopted vehicle’s model moved along the flat and the randomly uneven road with the almost similar and the almost different profiles for the left and the right wheels. Additionally, two values of the coefficient determining the maximum amplitude of road irregularities have been selected, i.e., 0.3 for the lower and 0.9 for the higher irregularities. This meant that the road conditions have been considered as one of the main factors possibly affecting disturbances of the motor vehicle’s motion. Such research seems valuable from the point of view of the road safety and the vehicles’ maintenance. A power-off straight maneuver is not very often performed during the normal road traffic and might seem useless. However, in this case it seemed essential to test the response of a vehicle’s model to such factors as, e.g., the uneven loading, suspension characteristics, etc. This in turn might prove valuable when considering, e.g., the additional con-centration of a driver to overcome the external disturbances acting on a moving vehicle. The presented research is the second part of the paper (Kisilowski, 2019) where the power-off maneuver was considered but with the straightforward motion control. Here, the straight-line control has been switched off to examine an untypical situation where, for example a driver loses consciousness, and the vehicle moves freely along the road.

scholarly journals An analysis of road pavement collapses and traffic safety hazards resulting from leaky sewers

2016 ◽  
Vol 11 (4) ◽  
pp. 251-258 ◽  
Author(s):  
Emilia Kuliczkowska
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Safety Hazards ◽  
Sewer Pipes ◽  
The Road ◽  
Road Traffic Safety ◽  
Road Pavement ◽  
Linear Defects ◽  
University Of Technology ◽  
Pavement Damage

In this paper, road pavement collapses resulting from sewer leakage are divided into six categories: negligible, marginal, considerable, serious, very serious and catastrophic, with the categorization being based on two criteria, both related to traffic safety, i.e., the number of fatalities caused by sinkholes, and the extent of the road pavement damage. The causes of road pavement collapses are also discussed. The study involved analyzing the deterioration of sewer pipes with long service lives, focusing on the most common materials, i.e., concrete and vitrified clay. The results of the sewer inspections performed by the Kielce University of Technology suggest that the spot and linear defects detected in sewers of this type can be divided into three groups. The findings were used to formulate some recommendations on how to improve road traffic safety by preventing road pavement collapses.

scholarly journals Influence of Legislation on Road Traffic Safety

2012 ◽  
Vol 22 (1) ◽  
pp. 75-81
Author(s):  
Marijan Rajsman ◽  
Georg-Davor Lisicin
Keyword(s):  
Traffic Safety ◽  
Road Traffic ◽  
Prognostic Models ◽  
Legal Regulations ◽  
Improvement Strategy ◽  
Safety Level ◽  
The Road ◽  
Road Traffic Safety ◽  
The Republic ◽  
Basic Hypothesis

The objective of this paper is to analyse road traffic safety in the Republic of Croatia based on the selected indicators which were used by the legislator in bringing the Law on Road Traffic Safety which has been in force since 28 July 2004, and the achieved effects in reaching the desired safety level in the three-year period from 2005 to 2007. The aim of the research is to establish a prognostic trend of the values of the studied indicators in the time period following the enforcement of new legal regulations. Adequate safety indicator values for the respective period were analyzed using the methods of analysis and synthesis, mathematical statistics as well as trend assessment based on the found mathematical prognostic models. Based on the results of this research it was found that the basic hypothesis according to which the implementation of new legal guidelines had to result in positive change in the condition of road traffic safety, failed to be confirmed. A change in the road traffic safety improvement strategy has been proposed as well as a more significant participation and recognition of the profession and science in this field which is of great significance for the society. KEY WORDS: influence of legal regulations, road traffic safety, effects and tendencies

scholarly journals Exploring the Informal Communication of Driver-to-Driver on Roads: A Case Study of Durban City, South Africa.

2021 ◽  
Vol 67 (4) ◽  
pp. 1-8
Author(s):  
Jacob Adedayo Adedeji ◽  
Xoliswa Feikie
Keyword(s):  
South African ◽  
Traffic Safety ◽  
Road Traffic ◽  
Structured Interview ◽  
Road User ◽  
Novice Drivers ◽  
The Road ◽  
Road Users ◽  
Hand Signal ◽  
On The Road

Road traffic fatality is rated as one of the ten causes of death in the world and with various preventive measures on a global level, this prediction is only placed on flat terrain and didn’t reduce. Nevertheless, road users’ communication is an essential key to traffic safety. This communication, be it formal or informal between the road users is an important factor for smooth traffic flow and safety. Communication language on roads can be categorized into; formal device-based signal (formal signal), formal hand signal (formal signal), informal device-based signal (informal signal), and informal gesture-based signal (everyday signal). However, if the intent of the message conveys is not properly understood by the other road user, mistakes and errors may set in. Overall, the formal signal is based on explicit learning which occurs during the driving training and the license testing process and the informal, implicit learning occur during the actual driving process on the road unintentionally. Furthermore, since the informal signal is not a prerequisite to driving or taught in driving schools, novice drivers are clueless and thus, might have contributed to errors and mistakes which leads to traffic fatalities. Therefore, this study seeks to document the informal means of communication between drivers on South African roads. Consequently, a qualitative semi-structured interview questionnaire would be used in the collection of informal signals, which were predominantly used on South African roads from driving instructors and thereafter, a focus group of passengers’ car, commercial and truck drivers will be used to validate the availability and their understanding of these informal signals using a Likert-type scale for the confidence level. In conclusion, the information gathered from this study will help improve road safety and understanding of road users especially drivers on the necessity of communication and possible adaptation for other developing countries.

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