scholarly journals Vehicles speed analysis in roundabouts vicinity

2014 ◽  
Vol 13 (4) ◽  
pp. 309-316
Author(s):  
Robert Ziółkowski
Keyword(s):  
Decision Making ◽  
Traffic Safety ◽  
Road Safety ◽  
Lower Number ◽  
Gps Data ◽  
Data Logger ◽  
Driving Speed ◽  
Instantaneous Speed ◽  
Vehicle Position ◽  
High Level

Driving speed is one of the most important factors in road safety as it not only affects the severity of a crash but it is also related to the risk of being involved in a crash. One of the solutions for improving safety in cities is to design new and replace already existing crossroads by roundabouts which offer improved safety over other types of intersections having fewer conflict points, slower speeds and easier decision making. Previously conducted studies considering traffic safety at crossroads in Bialystok have confirmed lower number of accidents and casualties at roundabouts when compared to other types of junctions but at the same time the number of collisions remained at unexpectedly high level. The paper presents the survey of instantaneous speed, decelerations and accelerations in vicinity of chosen roundabouts located in Bialystok. The data was gathered by utilizing a portable wireless GPS data logger that allowed monitoring and recording second-by-second in-field vehicle position along the tested sections.

The Influence of Roundabouts on Drivers’ Speed and Behaviour

2014 ◽  
Vol 1020 ◽  
pp. 674-679 ◽  
Author(s):  
Robert Ziolkowski
Keyword(s):  
Decision Making ◽  
Traffic Safety ◽  
Urban Areas ◽  
Road Safety ◽  
Traffic Accidents ◽  
Lower Number ◽  
Tracking Data ◽  
Driving Speed ◽  
Instantaneous Speed ◽  
High Level

Driving speed is one of the most important factors in road safety and speed not only affects the severity of a crash, but is also related to the risk of being involved in a crash. Inappropriate speed is responsible for more than a third of all fatal accidents occurring on roads. In Poland every year about 70% of all traffic accidents occur in urban areas from which most is recorded at junctions. In order to improve traffic safety many efforts have been undertaken but their performance is still not satisfactory. One of the solutions for improving safety in cities is designing new and replacing already existing crossroads by roundabouts. They offer improved safety over other types of intersections having fewer conflict points, slower speeds and easier decision making. Specially single-lane roundabouts are pointed as an example of a very safe junction when compared to not-signalised and signalised. Author’s previous research considering traffic safety at crossroads in Bialystok, Poland has confirmed lower number of accidents and deaths at roundabouts when compared to other types of junctions but at the same time the number of collisions remained at unexpectedly high level. The aim of this paper is to analyse the influence of roundabouts on drivers’ behaviour and approach and exit speeds at roundabouts located in Bialystok, Poland. Measurements of instantaneous speed, acceleration, deceleration and route tracking data were undertaken to develop the investigation.

scholarly journals Safety Improvements by Converting a Standard Roundabout with Unbalanced Flow Distribution into an Egg Turbo Roundabout: Simulation Approach to a Case Study

2019 ◽  
Vol 11 (2) ◽  
pp. 466 ◽  
Author(s):  
Vincenzo Gallelli ◽  
Rosolino Vaiana
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Flow Distribution ◽  
Calibration Procedure ◽  
Assessment Model ◽  
Lane Changing ◽  
Traffic Conflicts ◽  
Development Goals ◽  
High Level

In 2011, the United Nations Road Safety Collaboration (UNRSC) developed a Global Plan for the Decade of Action for Road Safety 2011–2020. Among the categories or “pillars” of activities, is the improvement of road safety for infrastructures. Furthermore, this plan is aligned by the UN Sustainable Development Goals that included even traffic safety. In this regard, this study estimates safety improvements achieved by converting a standard roundabout into an egg turbo roundabout. In particular, turbo roundabouts have become very popular in Northern Europe for both their safety and their capacity. Many studies have shown these advantages thanks to their features: preventive separation of entering flows, limited lane changing and low speeds due to curbs. Given the absence of existing turbo roundabouts in Italy, this research studied and compared a “virtual” roundabout with spiraling circular carriageways to an existing multi-lane roundabout in order to assess its significant reduction in terms of potential collisions. This study relied on traffic conflicts in micro-simulation by using VISSIM software and then Surrogate Safety Assessment Model (SSAM). The research is based on the traffic process observed at a standard roundabout in Cosenza (Italy) marked by a high level of congestion and safety problems. Speeds, critical gaps, queue lengths, and floating car data, obtained from video observations, have been used as input data for the calibration procedure of the first scenario (case study roundabout). Then, the turbo roundabout solution was built and simulated by using the previously derived parameters. Finally, the two roundabout scenarios were compared in terms of spatial distribution of the potential conflicts determined by SSAM. The results could help to measure the performance and safety impact of these two roundabout configurations.

THE USE OF INTEGRATED PROGRAMMES WHILE ENSURING TRAFFIC SAFETY IN ROAD TRANSPORT

2016 ◽  
Vol 3 (1) ◽  
pp. 192-196
Author(s):  
Витвицкий ◽  
E. Vitvitskiy ◽  
Порхачёва ◽  
S. Porkhacheva
Keyword(s):  
Traffic Safety ◽  
Road Safety ◽  
Road Transport ◽  
Road Accidents ◽  
High Level

In the article the basic provisions on enforcement of road safety in road transport, through the use of the principles of program-target approach for the implementation of effective interven-tions aimed at reducing the high level of road accidents

Built Environment and Driving Outcomes

2016 ◽  
pp. 571-588
Author(s):  
Xiaoguang Wang ◽  
Lidia Kostyniuk ◽  
Michelle Barnes
Keyword(s):  
Built Environment ◽  
Traffic Safety ◽  
Time Of Day ◽  
Gps Data ◽  
Spatial Intelligence ◽  
Driving Speed ◽  
Gis Data ◽  
Naturalistic Driving ◽  
Driving Outcomes ◽  
Business Concentration

This study demonstrates a segment-based approach to integrate GIS and GPS data to address questions about the connections between the built environment and travel behaviors. Methods and challenges of GPS/GIS integration are discussed, and an application integrating GPS naturalistic driving data from Southeast Michigan together with GIS data from several sources is demonstrated. The integrated dataset is used to explore connections between the built environment and driving behavior, specifically between business concentration, driving speed, vehicle stops and rear-end crashes. Driving speed, an important determinant of driver behavior linked to traffic safety, is found to be inversely related to business concentration, a pattern that does not vary by time of day. Rear-end crashes are found to increase with vehicle stops which increase with business concentration. This demonstration showed that fusing GPS and GPS data provides spatial intelligence which can be used to address planning, traffic safety, and transportation related issues.

scholarly journals Assessment of Significant Factors Affecting Frequent Lane-Changing Related to Road Safety: An Integrated Approach of the AHP–BWM Model

2021 ◽  
Vol 18 (20) ◽  
pp. 10628
Author(s):  
Danish Farooq ◽  
Sarbast Moslem ◽  
Arshad Jamal ◽  
Farhan Muhammad Butt ◽  
Yahya Almarhabi ◽  
...  
Keyword(s):  
Decision Making ◽  
Hierarchical Structure ◽  
Traffic Safety ◽  
Road Safety ◽  
Real Life ◽  
Integrated Approach ◽  
Lane Changing ◽  
Factors Affecting ◽  
Proposed Model ◽  
Significant Factors

Frequent lane changes cause serious traffic safety concerns for road users. The detection and categorization of significant factors affecting frequent lane changing could help to reduce frequent lane-changing risk. The main objective of this research study is to assess and prioritize the significant factors and sub-factors affecting frequent lane changing designed in a three-level hierarchical structure. As a multi-criteria decision-making methodology (MCDM), this study utilizes the analytic hierarchy process (AHP) combined with the best–worst method (BWM) to compare and quantify the specified factors. To illustrate the applicability of the proposed model, a real-life decision-making problem is considered, prioritizing the most significant factors affecting lane changing based on the driver’s responses on a designated questionnaire survey. The proposed model observed fewer pairwise comparisons (PCs) with more consistent and reliable results than the conventional AHP. For level 1 of the three-level hierarchical structure, the AHP–BWM model results show “traffic characteristics” (0.5148) as the most significant factor affecting frequent lane changing, followed by “human” (0.2134), as second-ranked factor. For level 2, “traffic volume” (0.1771) was observed as the most significant factor, followed by “speed” (0.1521). For level 3, the model results show “average speed” (0.0783) as first-rank factor, followed by the factor “rural” (0.0764), as compared to other specified factors. The proposed integrated approach could help decision-makers to focus on highlighted significant factors affecting frequent lane-changing to improve road safety.

Built Environment and Driving Outcomes

2014 ◽  
Vol 5 (2) ◽  
pp. 11-29 ◽  
Author(s):  
Xiaoguang Wang ◽  
Lidia Kostyniuk ◽  
Michelle Barnes
Keyword(s):  
Built Environment ◽  
Traffic Safety ◽  
Time Of Day ◽  
Gps Data ◽  
Spatial Intelligence ◽  
Driving Speed ◽  
Gis Data ◽  
Naturalistic Driving ◽  
Driving Outcomes ◽  
Business Concentration

This study demonstrates a segment-based approach to integrate GIS and GPS data to address questions about the connections between the built environment and travel behaviors. Methods and challenges of GPS/GIS integration are discussed, and an application integrating GPS naturalistic driving data from Southeast Michigan together with GIS data from several sources is demonstrated. The integrated dataset is used to explore connections between the built environment and driving behavior, specifically between business concentration, driving speed, vehicle stops and rear-end crashes. Driving speed, an important determinant of driver behavior linked to traffic safety, is found to be inversely related to business concentration, a pattern that does not vary by time of day. Rear-end crashes are found to increase with vehicle stops which increase with business concentration. This demonstration showed that fusing GPS and GPS data provides spatial intelligence which can be used to address planning, traffic safety, and transportation related issues.

Radiological safety and assessment of the performance of X-ray systems in veterinary facilities

2020 ◽  
Author(s):  
S. Economides ◽  
C.J. Hourdakis ◽  
C. Pafilis ◽  
G. Simantirakis ◽  
P. Tritakis ◽  
...  
Keyword(s):  
Decision Making ◽  
Radiation Protection ◽  
Atomic Energy Commission ◽  
Atomic Energy ◽  
Regulatory Control ◽  
Continuous Training ◽  
X Ray ◽  
The Public ◽  
Radiological Safety ◽  
High Level

This paper concerns an analysis regarding the performance of X-ray equipment as well as the radiological safety in veterinary facilities. Data were collected from 380 X-ray veterinary facilities countrywide during the on-site regulatory inspections carried out by the Greek Atomic Energy Commission. The analysis of the results shows that the majority of the veterinary radiographic systems perform within the acceptable limits; moreover, the design and shielding of X-ray rooms as well as the applied procedures ensure a high level of radiological safety for the practitioners, operators and the members of the public. An issue that requires specific attention in the optimization process for the proper implementation of veterinary radiology practices in terms of radiological safety is the continuous training of the personnel. The above findings and the regulatory experience gained were valuable decision-making elements regarding the type of the regulatory control of veterinary radiology practices in the new radiation protection framework.

Decision making power of college girls in relation to clothing

2018 ◽  
Vol 9 (01) ◽  
Author(s):  
Parul Gill ◽  
Poonam Malik ◽  
Pankaj Gill
Keyword(s):  
Decision Making ◽  
Satisfaction Level ◽  
College Going ◽  
Level Of Satisfaction ◽  
High Level ◽  
Garment Design ◽  
Structured Questionnaire

The present study was undertaken to explore the decision making patterns of college girls in relation to clothing and their satisfaction level with these decision making patterns. Thirty under graduate college girls from Panipat city were approached to record their responses regarding decision making in relation to clothing and satisfaction level through a well structured questionnaire. It was found that most of the girls (56.66%) themselves made the decisions about the type of garment (Indian, western or both) they wear and majority of girls (70%) were highly satisfied with this decision making. Parents performed the role of buyers for their college going daughters' garments in most of the cases (63.33%) and the 73.33% girls had high level of satisfaction with this. In most of the cases (60%) the decision about the garment design was made by the girls themselves and they were highly satisfied with it. Keywords: clothing, college, girls, decision making.

Investigations of Road Wear Caused by Studded Tires

2014 ◽  
Vol 42 (1) ◽  
pp. 2-15
Author(s):  
Johannes Gültlinger ◽  
Frank Gauterin ◽  
Christian Brandau ◽  
Jan Schlittenhard ◽  
Burkhard Wies
Keyword(s):  
Traffic Safety ◽  
Test Bench ◽  
Operating Conditions ◽  
Test Method ◽  
Analytical Models ◽  
The Road ◽  
Driving Speed ◽  
Major Factors ◽  
Tire Friction ◽  
Variable Operating Conditions

ABSTRACT The use of studded tires has been a subject of controversy from the time they came into market. While studded tires contribute to traffic safety under severe winter conditions by increasing tire friction on icy roads, they also cause damage to the road surface when running on bare roads. Consequently, one of the main challenges in studded tire development is to reduce road wear while still ensuring a good grip on ice. Therefore, a research project was initiated to gain understanding about the mechanisms and influencing parameters involved in road wear by studded tires. A test method using the institute's internal drum test bench was developed. Furthermore, mechanisms causing road wear by studded tires were derived from basic analytical models. These mechanisms were used to identify the main parameters influencing road wear by studded tires. Using experimental results obtained with the test method developed, the expected influences were verified. Vehicle driving speed and stud mass were found to be major factors influencing road wear. This can be explained by the stud impact as a dominant mechanism. By means of the test method presented, quantified and comparable data for road wear caused by studded tires under controllable conditions can be obtained. The mechanisms allow predicting the influence of tire construction and variable operating conditions on road wear.

scholarly journals EXPRESS: Marketers Project Their Personal Preferences onto Consumers: Overcoming the Threat of Egocentric Decision Making

2021 ◽  
pp. 002224372199837
Author(s):  
Walter Herzog ◽  
Johannes D. Hattula ◽  
Darren W. Dahl
Keyword(s):  
Decision Making ◽  
Consumer Preferences ◽  
Research Question ◽  
Pilot Studies ◽  
Low Level ◽  
Marketing Managers ◽  
False Consensus Effect ◽  
False Consensus ◽  
High Level

This research explores how marketing managers can avoid the so-called false consensus effect—the egocentric tendency to project personal preferences onto consumers. Two pilot studies were conducted to provide evidence for the managerial importance of this research question and to explore how marketing managers attempt to avoid false consensus effects in practice. The results suggest that the debiasing tactic most frequently used by marketers is to suppress their personal preferences when predicting consumer preferences. Four subsequent studies show that, ironically, this debiasing tactic can backfire and increase managers’ susceptibility to the false consensus effect. Specifically, the results suggest that these backfire effects are most likely to occur for managers with a low level of preference certainty. In contrast, the results imply that preference suppression does not backfire but instead decreases false consensus effects for managers with a high level of preference certainty. Finally, the studies explore the mechanism behind these results and show how managers can ultimately avoid false consensus effects—regardless of their level of preference certainty and without risking backfire effects.

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