The Use of the UCF Driving Simiulator to Test the Contribution of Larger Size Vehicles (LSVs) in Rear-end Collisions and Red Light Running on Intersections PDF Download
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Author: Rami Charles Harb
Publisher:
ISBN:
Category :
Languages : en
Pages : 164
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Book Description
A suggested solution for the vertical visibility blockage of the traffic light problem that consisted of adding a traffic signal pole on the right side of the road was also designed in the driving simulator.
Author: Rami Charles Harb
Publisher:
ISBN:
Category :
Languages : en
Pages : 164
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Book Description
A suggested solution for the vertical visibility blockage of the traffic light problem that consisted of adding a traffic signal pole on the right side of the road was also designed in the driving simulator.
Author:
Publisher:
ISBN:
Category : Automobile driving simulators
Languages : en
Pages : 346
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Book Description
The UCF Driving simulator was used to test a proposed pavement-marking design. This marking is placed upstream of signalized intersections to assist the motorists with advance warning concerning the occurrence of the clearance interval. The results of the experiment have indicated promising results for intersection safety. Firstly compared to regular intersections, the pavement marking could results in a 74.3 percent reduction in red-light running. In comparison, the pavement marking reduced the number of occurrences where drivers chose to continue through an intersection when it was not safe to proceed compared to the without marking, and this result is correlated to less red-light running rate with marking. According to survey results, all of the tested subjects gave a positive evaluation of the pavement-marking countermeasure and nobody felt confused or uncomfortable when they made stop-go decision. In comparison between scenarios without marking and with marking, there is no significant difference found in the operation speeds and drivers brake response time, which proved that the marking has no significantly negative effect on driver behaviors at intersections. The UCF driving simulator was also used to test vertical and horizontal visibility blockages. For the horizontal visibility blockage, two sub-scenarios were designed, and the results confirmed that LTVs contribute to the increase of rear-end collisions on the roads. This finding may be contributed to the fact that LTVs cause horizontal visibility blockage. Indeed, the results showed that passenger car drivers behind LTVs are prone to speed more and to keep a small gap with the latter relatively to driving behind passenger cars. From the survey analysis 65% of the subjects said that they drive close to LTVs in real life. As for the vertical visibility blockage, three sub-scenarios were designed in the driving simulator, and the results confirmed that LSVs increase the rate of red light running significantly due to vertical visibility blockage of the traffic signal pole. However, the behavior of the drivers when they drive behind LSVs is not different then their behavior when drive behind passenger cars. The suggested addition of the traffic signal pole on the side of the road significantly decreased the red light running rate. Moreover, 65% of the subjects driving behind an LSV with the proposed additional traffic signal pole said that the traffic signal pole is effective and that it should be applied to real world.
Author: Cristina Dos Santos
Publisher:
ISBN:
Category : Automobile driving simulators
Languages : en
Pages : 406
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Book Description
Researchers at the University of Central Florida (UCF) have been working during the past few years on different strategies to improve freeway safety in real-time. An ongoing research at UCF has investigated crash patterns that occurred on a stretch of Interstate-4 located in Orlando, FL and created statistical models to predict in real-time the likelihood of a crash in terms of time and space. The models were then tested using PARAMICS micro-simulation and different strategies that would reduce the risk of crashes were suggested. One of the main recommended strategies was the use of Variable Speed Limits (VSL) which intervenes by reducing the speed upstream the segment of high risk and increasing the speed downstream. The purpose of this study is to examine the recommendations reached by the micro-simulation using the UCF driving simulator. Drivers' speed behavior in response to changes in speed limits and different information messages are observed. Different scenarios that represent the recommendations from the earlier micro-simulation study and three different messages displayed using Variable Message Signs (VMS) as an added measure to advice drivers about changes in the speed limit were created. In addition, abrupt and gradual changes in speed were tested against the scenarios that maintained the speed limit constant or did include a VSL or VMS in the scenarios' design (base case). Dynamic congestion was also added to the scenarios' design to observe drivers' reactions and speed reductions once drivers approached congestion. A total of 85 subjects were recruited. Gender and age were the controlling variables for the subjects' recruitment. Each of the subjects drove 3 out of a total of 24 scenarios. In addition, a survey was conducted and involved hypothetical questions, including knowledge about VMS and VSL, and questions about their driving behavior. The survey data were useful in identifying the subjects' compliance with the speed limit and VSL/VMS acceptance. Two statistical analytical techniques were performed on the data that were collected from the simulator: ANOVA and PROC MIXED. The ANOVA test was used to investigate if the differences in speed and reaction distances between subjects were statistically significant for each sign compared to the base case. The PROC MIXED analysis was used to investigate the differences of all scenarios (24x24) based on the spot speed data collected for each driver. It was found from the analyses that drivers follow better the message displayed on VMS that informs them that the speed is changing, whether it is or not, strictly enforced as opposed to providing the reason for change or no information. Moreover, an abrupt change in speed produced immediate results; however both abrupt and gradual changes in speed produced the same reduction in speed at the target zone. It was also noticed that most drivers usually drive 5 mph above the speed limit, even though in the survey analysis the majority of them stated that they drive in compliance with the speed limit or with the flow of traffic. This means that if a modest speed reduction of 5 mph is requested they will ignore it, but if a 10 mph reduction is recommended they will reduce the speed by at least 5 mph. Consequently, it was noticed that drivers arrived at the congestion zone with a slower speed than the base speed limit due to the combination of VMS and VSL signage. By having drivers approaching congestion with a slower speed, potential rear-end crashes could be avoided. Comparing the two genders indicated that females are more likely to follow the VMS's recommendations to reduce the speed. Also females in general drive above the speed limit between 2 mph and 3 mph, while males drive above the speed limit between 5 mph and 8 mph. From the analysis of the age factor, it was concluded that drivers from the 16-19 age group drive faster and drivers from the 45 and above age group drive slower, than the drivers from the other groups. In general, all drivers reduced and/or increased their speed accordingly when a VMS and/or VSL was present in the scenario advising for this change in the speed limit. The investigations conducted for this thesis proved that the recommendations suggested previously based on the crash risk model and micro-simulation (Abdel-Aty et al., 2006) aid drivers in reducing their speed before they approach a segment of high risk and by doing so reduce the likelihood of a crash. Finally, the real-time safety benefits of VMS and VSL should be continuously evaluated in future studies.
Author:
Publisher:
ISBN:
Category : Automobile driving simulators
Languages : en
Pages : 141
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Book Description
Author: Federico Butera
Publisher:
ISBN: 9789211326444
Category : Architecture
Languages : en
Pages : 421
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Author: Karl M. Kapp
Publisher: John Wiley & Sons
ISBN: 111867443X
Category : Business & Economics
Languages : en
Pages : 487
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Book Description
Following Karl Kapp's earlier book The Gamification of Learning and Instruction, this Fieldbook provides a step-by-step approach to implementing the concepts from the Gamification book with examples, tips, tricks, and worksheets to help a learning professional or faculty member put the ideas into practice. The Online Workbook, designed largely for students using the original book as a textbook, includes quizzes, worksheets and fill-in-the-blank areas that will help a student to better understand the ideas, concepts and elements of incorporating gamification into learning.
Author: Yoseph Bar-Cohen
Publisher: John Wiley & Sons
ISBN: 3527626638
Category : Science
Languages : en
Pages : 827
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Book Description
Uniquely comprehensive and up to date, this book covers terrestrial as well as extraterrestrial drilling and excavation, combining the technology of drilling with the state of the art in robotics. The authors come from industry and top ranking public and corporate research institutions and provide here real-life examples, problems, solutions and case studies, backed by color photographs throughout. The result is a must-have for oil companies and all scientists involved in planetary research with robotic probes. With a foreword by Harrison "Jack" Schmitt -- the first geologist to drill on the moon.
Author: Gareth Stratton
Publisher: Psychology Press
ISBN: 9780415286619
Category : Psychology
Languages : en
Pages : 240
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Book Description
Blending contemporary sports science theory with youth specific coaching practice, this book offers soccer development strategies that are tailored to the needs of young players.
Author: Youcheng Wang
Publisher: CABI
ISBN: 1845937627
Category : Business & Economics
Languages : en
Pages : 380
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Book Description
This book offers a comprehensive understanding of the concept and scope of the tourism industry in general and of destination marketing and management in particular. Taking an integrated and comprehensive approach, it focuses on both the macro and micro aspects of destination marketing and management. The book consists of 27 chapters presented in seven parts with the following themes: concept, scope and structure of destination marketing and management, destination planning and policy, consumer decision-making processes, destination marketing research, destination branding and positioning, destination product development and distribution, the role of emerging technologies in destination marketing, destination stakeholder management, destination safety, disaster and crisis management, destination competitiveness and sustainability, and challenges and opportunities for destination marketing and management.
Author: William Anderson
Publisher:
ISBN:
Category : Constitutional history
Languages : en
Pages : 480
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