scholarly journals Development of a New Risk Assessment Methodology for Light Goods Vehicles on Two-Lane Road Sections

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1271
Author(s):  
Marko Subotić ◽  
Veljko Radičević ◽  
Zoran Pavlović ◽  
Goran Ćirović
Keyword(s):  
Traffic Accident ◽  
Road Network ◽  
Statistical Parameters ◽  
Minimum Risk ◽  
Risk Levels ◽  
Longitudinal Gradients ◽  
Risk Research ◽  
Measuring Section ◽  
Risk Assessment Methodology ◽  
Statistical Indicators

Increasing mobility directly affects traffic frequency and thus increases the possible risk of traffic accident occurrences. Taking this into account, it is necessary to create models for determining risk and to act preventively based on these models; this is of great importance both to society and science. In this paper, six measuring sections of a road network are considered on the basis of eight geometric-exploitation road parameters, taking into account the data for light goods vehicles. An original methodology is proposed for identifying risk levels of road sections through their evaluation. For identifying risk levels, the Dombi Logarithmic Methodology of Additive Weights (D’LMAW) was used, which was combined with the Measurement Alternatives and Ranking according to the Compromise Solution (MARCOS) method. Statistical indicators were processed using a hybrid methodology based on the application of rough numbers and Dombi–Bonferroni functions. The performance of the presented methodology was verified on a real-world example, processing the statistical parameters of six two-lane road sections, with the sixth measuring section showing the best performance, since it had the minimum risk. Research has shown that measuring sections with increasing longitudinal gradients are safer. The analysis of measuring sections from fall to rise reduces the deviation of speeds from the speed limit on the roads. The effectiveness, rationality, and robustness of the solution of the proposed methodology was confirmed through a sensitivity analysis.

scholarly journals Specifics of road safety inspection in tunnels

2021 ◽  
Vol 67 (3) ◽  
pp. 33-38
Author(s):  
Emir Smailovic ◽  
Boris Antić ◽  
Dalibor Pešić ◽  
Slaviš Beronja
Keyword(s):  
Energy Efficiency ◽  
Road Safety ◽  
Traffic Accident ◽  
Road Network ◽  
Road Traffic ◽  
State Of The Art ◽  
Safety Standards ◽  
The Road ◽  
Road Users ◽  
Road Tunnels

Tunnels are underground passages, placed horizontally, which serve to lead the road through them. In order to fulfill its purpose in road traffic, the tunnel must fit into the traffic infrastructure and as such not create an obstacle in movement and enable the movement of vehicles from entrance to exit without danger, but with increased restriction of freedom of lateral evacuation. Tunnels are among some of the most risky parts of the road network, primarily due to space constraints, where there is a possibility of a traffic accident. Managing the risks associated with the passage of road traffic, and in particular the safety of traffic in tunnels, is a serious problem in many countries. With the growing number of road users, it is necessary to adopt stricter standards regarding road tunnels. In addition to meeting these safety standards, factors such as operational requirements, economic efficiency, energy efficiency and state-of-the-art technology should also be taken into account when planning and equipping tunnels.

scholarly journals An integrated risk assessment for maintenance prediction of oil wetted gearbox and bearing in marine and offshore industries using a fuzzy rule base method

2020 ◽  
Vol 234 (2) ◽  
pp. 313-331
Author(s):  
Maurice Asuquo ◽  
Jin Wang ◽  
Lihong Zhang ◽  
Geraint Phylip-Jones
Keyword(s):  
Risk Assessment ◽  
Fuzzy Rule ◽  
Assessment Model ◽  
Rule Base ◽  
Wear Rates ◽  
Risk Levels ◽  
Integrated Risk Assessment ◽  
Integrated Risk ◽  
Base Method ◽  
Risk Assessment Methodology

This article presents an integrated risk assessment methodology for maintenance prediction of oil wetted gearbox and bearing in marine and offshore machinery with emphasis on ship cranes. Predictive maintenance uses important parameters measured in the equipment to ‘feel’ when breakdown is eminent. This type of maintenance intends to make interventions on machinery before harmful events may occur. This article assesses the risk levels of bearing and gearbox, which are the most sensitive components of the ship crane using fuzzy rule–based judgement for common elements and their sources. This will provide the ship crane operators with a means to predict possible impending failure without having to dismantle the crane. Furthermore, to monitor the rate of wear in gearbox and bearing of a ship crane, the ship crane reliability, and a trend to provide an operational baseline of data that will help the engineers to detect abnormal wear rates as they develop, is established. Within the scope of this research, a risk assessment model is developed for determining the risk levels of a crane’s components and recommending solutions using all the diagnostic capability obtainable for effective condition monitoring of the gearbox and bearing in ship cranes.

HAZARD ASSESSMENT OF A REGULATED PEDESTRIAN CROSSING ON THE EXAMPLE OF THE STREET AND ROAD NETWORK OF THE CITY OF VORONEZH

2020 ◽  
Vol 71 (4) ◽  
pp. 54-60
Author(s):  
V.S. VOLKOV ◽  
◽  
D.Ju. KASTYRIN ◽  
E.G. LEBEDEV ◽  
◽  
...  
Keyword(s):  
Risk Assessment ◽  
Risk Factor ◽  
Traffic Accident ◽  
Road Network ◽  
Road Accident ◽  
Risk Indicators ◽  
Road Accidents ◽  
Pedestrian Crossing ◽  
The City ◽  
Annual Risk

The factors that determine the possibility of a traffic accident at a regulated crossing are sys-tematized. the risk estimates for road accidents are calculated based on the results of the annual cycle and daily in the mode of hourly intervals. The risk factor of a conflict point of a controlled transition is proposed, which is determined in relation to the risk indicators of a road accident in an hour-long interval of real-time mode to the average annual risk assessment of a road accident, reduced to an hour-long interval.

Road Traffic Accident in Ethiopia from 2007/08-2017/18

2019 ◽  
Vol 2 (2) ◽  
pp. 49-59
Author(s):  
Debela Deme
Keyword(s):  
Growth Rate ◽  
Road Traffic Accident ◽  
Traffic Accident ◽  
Road Network ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Annual Growth Rate ◽  
Road Traffic Accidents ◽  
Network Coverage ◽  
The Past

Traffic accident increased periodically in alarming rate and it was a serious problem throughout the globe particularly in developing countries like Ethiopia. This research concerns on Analyzing Road Traffic Accident in Ethiopia from 2007/08-2017/18. The main objective of the study was to investigate the growth rate of road traffic accident, road network coverage and motorized vehicle, and relationship between them in the past elven (11) year. In order to address the required objective the study use secondary data collected from Ethiopia federal police commission, Ethiopia road authority and Ethiopia federal transport authority. Basically, descriptive and inferential statistical analysis approach was used to analyze the data. The finding of the study revealed that; in the past eleven year more than 291577 Road traffic accident, 912956km road network and 681000 motorized vehicles were developed. Due to Road traffic accident Ethiopia loses around 36.3 billion birr (estimated 1.3 billion $ in current exchange rate of 28 birr for 1$) in the past eleven (11) year in Ethiopia. In average annually Ethiopia loses around 0.9% of budget due to traffic accident in the past eleven year. Average annual growth rate of road traffic accident, road network development and motorized vehicle were 9.16%, 10.81% and 13.34% respectively. In Ethiopia in the past eleven (11) years more than 276491 road traffic accidents, 912956km road network and 681000 number of motorized vehicle were newly introduced since 2007/08 in the study period. The variation on road traffic accident, road network coverage in km and motorized vehicle between commencement of study period (2007/08) or Ethiopia millennium (2000E.C) with end of the study period (2017/18) were estimated around 25914, 82414 and 563003 respectively. Finally, the study intend that road traffic accident had no direct or indirect relation with growth of motorized vehicle and road network coverage in Ethiopia. To curb the problem faced due to road traffic accident the government and other stakeholder must careful the issues to minimize road traffic accidents in Ethiopia.

scholarly journals Shortest Path Algorithm in Dynamic Restricted Area Based on Unidirectional Road Network Model

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 203
Author(s):  
Haitao Wei ◽  
Shusheng Zhang ◽  
Xiaohui He
Keyword(s):  
Network Model ◽  
Shortest Path ◽  
Road Network ◽  
Transportation Network ◽  
Optimal Path ◽  
Network Routing ◽  
Navigation Systems ◽  
Search Performance ◽  
Statistical Parameters ◽  
The Real

Accurate and fast path calculation is essential for applications such as vehicle navigation systems and transportation network routing. Although many shortest path algorithms for restricted search areas have been developed in the past ten years to speed up the efficiency of path query, the performance including the practicability still needs to be improved. To settle this problem, this paper proposes a new method of calculating statistical parameters based on a unidirectional road network model that is more in line with the real world and a path planning algorithm for dynamically restricted search areas that constructs virtual boundaries at a lower confidence level. We conducted a detailed experiment on the proposed algorithm with the real road network in Zhengzhou. As the experiment shows, compared with the existing algorithms, the proposed algorithm improves the search performance significantly in the condition of optimal path under the premise of ensuring the optimal path solution.

Research and Application of Risk Assessment Methodology for Power Station Boiler Superheaters

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Fujun Liu ◽  
Shuai Kong ◽  
Zhangwei Ling ◽  
Qiang Li ◽  
Yueqiang Qian ◽  
...  
Keyword(s):  
Risk Assessment ◽  
High Temperature ◽  
Good Effect ◽  
Power Station ◽  
Knowledge Application ◽  
Risk Levels ◽  
Modification Factor ◽  
Erosion Factor ◽  
Equipment And Pipelines ◽  
Risk Assessment Methodology

Risk-based inspection (RBI) has been applied to good effect in relation to pieces of equipment and pipelines in the petrochemical industry worldwide, but to the best of our knowledge application of RBI to power station boilers has not hitherto been reported. The tubes of the four key components, namely, the economizer, the water-cooling wall, the superheater, and the reheater, are prone to blast due to direct fire heating. Such a blast always causes unplanned shutdown and has severe safety implications. Based on the “API 581-2000” code (Risk-Based Inspection Base Resource), the failure mechanisms of power station boilers have been studied, and the high-temperature smoke erosion factor and high-temperature creep factor have been calculated. Then, considering specific situations in China, such as material quality and extended service, a failure modification factor based on remaining life has been proposed. Finally, two risk assessment projects have been carried out; after delineating the risk levels of the tubes, appropriate management suggestions have been proposed. The obtained data should provide some technical support for the application of RBI to power station boilers.

scholarly journals THE IMPACT OF ROAD PARAMETERS AND THE SURROUNDING AREA ON TRAFFIC ACCIDENTS

Transport ◽  
2009 ◽  
Vol 24 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Tomas Šliupas
Keyword(s):  
Traffic Accident ◽  
Road Network ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Real Data ◽  
Road Traffic Accidents ◽  
Surrounding Area ◽  
Accident Rate ◽  
The Road ◽  
The Impact

The article analyses the data on road traffic accidents in Lithuanian main and interurban road networks in the years 2002–2006. The road network is divided into 341 road sections. The surrounding area and road parameters of each of the sections are measured. Then, the dependence of traffic accident rate on the parameters is studied and described using linear and multiple regressions. The equations are built using 90% of the available data and tested forecasting traffic accident rate for the rest of 10% of the data comparing the obtained results with the real data.

scholarly journals Ecological criterion effect on the forest road network longitudinal gradient

2013 ◽  
Vol 61 (6) ◽  
pp. 1715-1723
Author(s):  
Petr Hrůza
Keyword(s):  
Road Network ◽  
Construction Technology ◽  
Forest Stands ◽  
Forest Environment ◽  
Longitudinal Gradient ◽  
Forest Road ◽  
Road Design ◽  
Longitudinal Gradients ◽  
The Mean ◽  
Selection Of

The specific way in which a forest road is designed affects the management in the forest environment and timber transport. The aim of this study was to find out whether an inclusion of the ecological criterion in the forest road design will change the parameter of the longitudinal gradient of forest hauling roads and whether these changes will have an effect on the accessibility of forest stands by timber hauling machinery. The possible changes in the longitudinal gradient can also affect the technology of forest road surfacing and the selection of the appropriate surface type. We can state that an inclusion of the ecological criterion in the forest road network design will bring statistically significant changes in longitudinal gradients of forest hauling roads. The mean longitudinal gradient of the current forest road network is 2.82 % and the mean longitudinal gradient of the forest road network designed with inclusion of the ecological criterion is 4.82 %. The results show statistically significant changes in the longitudinal parameters of forest hauling roads. However, it will not bring a need for a change in construction technology, and will not affect the accessibility of forest stands by timber hauling machinery.

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