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Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (555 download)
Download or read book Effectiveness of green-extension systems at high-speed intersections written by and published by . This book was released on 1977 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles V. Zegeer
Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (37 download)
Download or read book Effectiveness of Green Extension Systems at High Speed Intersections written by Charles V. Zegeer and published by . This book was released on 1977 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles V. Zegeer
Publisher :
ISBN 13 :
Total Pages : 41 pages
Book Rating : 4.:/5 (173 download)
Download or read book Effectiveness of Green-extension Systems at High-speed Intersections. Final Report written by Charles V. Zegeer and published by . This book was released on 1977 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles V. Zegeer
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (13 download)
Download or read book Green-extension Systems at High-speed Intersections written by Charles V. Zegeer and published by . This book was released on 1978 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Prahlad D. Pant
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (555 download)
Download or read book Dilemma Zone Protection and Signal Coordination at Closely-spaced High-speed Intersections written by Prahlad D. Pant and published by . This book was released on 2001 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A feasibility study of dilemma zone problems, performed by collecting and analyzing traffic flow data at a high-speed signalized intersection, showed that the maximum green extension or cutback needed to get a vehicle out of the dilemma zone is generally no more than 2 seconds. If we scan all vehicles on a link just a few seconds before the beginning of a yellow interval, we may be able to extend or cut back the green interval so that the vehicles can avoid the dilemma zone. For each vehicle approaching an intersection on the link that is about to turn yellow, there is a time interval such that (a) the vehicle will be in the dilemma zone without green extension (or cutback) or (b) it will be in the dilemma zone when there are T seconds of extension (or cutback). So the task is to find the smallest nonnegative integer T that is not in any of these time intervals and extend (or cut back) the current interval by T seconds. This T can always be found and assuming there are no other restrictions, dilemma zones can be avoided and the extension (or cutback) is done at most once for each green interval. The simulation study, performed by modifying the source codes of NETSIM, showed that the signal timing generated by a bandwidth maximization program (PASSER-II) resulted in a lower number of vehicles in the dilemma zone than that generated by a delay minimization program (TRANSYT-7F). Additionally, the signal timing generated by the combination of the two programs, that is, by minimizing delay within the constraint of bandwidth maximization, resulted in an even lower number of vehicles in the dilemma zone than those generated by each program alone. The technique developed in this study can be implemented if the speeds and positions of all vehicles on the roadway can be recorded at small time intervals (e.g., 1 sec). Recommendations are made for implementing and testing the developed technique.
Author : Ronald W. Eck
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.3/5 (91 download)
Download or read book Accident Countermeasures at High-speed Signalized Intersections written by Ronald W. Eck and published by . This book was released on 1984 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advance warning including flashing signs and strobe lights. Survey of traffic engineers at state and local agencies.
Author : Venkata Suresh Raavi
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (794 download)
Download or read book A Novel Approach to Dilemma Zone Problem for High Speed Signalized Intersections written by Venkata Suresh Raavi and published by . This book was released on 2010 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Safety and efficiency are both major concern at high-speed intersections. It has been a major challenge for traffic engineers over the years to increase efficiency without sacrificing delay. An IntelliDrive signal control system was developed in the University of Akron's transportation lab based on the concept of IntelliDrive technology that can improve safety significantly while retaining efficiency. The new intelligent signal control system can address the dynamic dilemma zone problem, thus providing maximum safety at intersections. Every vehicle in the system is addressed to its own dilemma boundary rather than addressing dilemma zone for the whole intersection approach. By obtaining advance speed information, vehicle classification, vehicle location from the stop line, for every vehicle for every second in the system in real time, unneeded extensions can be avoided. Thus the intersection not only operates more safely, but also more efficiently because of the proposed algorithm logic that utilizes IntelliDrive technology. IntelliDrive test bed was created in VISSIM simulation platform and tested for operational efficiency when safety criteria are met. This thesis also discusses the characteristics of the Peak Flow Factor (PFF) which is the ratio between peak hourly volume and peak flow rate within the hour. Despite the fact that the Highway Capacity Manual (HCM) requires use of this ratio in evaluating the Levels of Service (LOS) of roadway facilities, a very limited amount of prior research has been made on its variability. Subsequently, the HCM established a time interval of 15 minutes for obtaining the peak flow rate without much explanation on why this time interval was chosen. In order to investigate the PFF's effectiveness for representing the variation of flow within peak hour, this research focuses on PFF analysis and time series models of the PFF at various time intervals for signalized isolated intersections. Results showed that the PFF decreased when time interval decreased and that significant differences in the stability were apparent when each time interval were compared. In addition, the developed time series models showed the the[sic] PFF can be forecasted with relative accuracy and simulation models within this study demonstrated the test results from data are dependable."--Abstract.
Author :
Publisher :
ISBN 13 :
Total Pages : 670 pages
Book Rating : 4.:/5 (318 download)
Download or read book Traffic Control Systems Handbook written by and published by . This book was released on 1976 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook, which was developed in recognition of the need for the compilation and dissemination of information on advanced traffic control systems, presents the basic principles for the planning, design, and implementation of such systems for urban streets and freeways. The presentation concept and organization of this handbook is developed from the viewpoint of systems engineering. Traffic control studies are described, and traffic control and surveillance concepts are reviewed. Hardware components are outlined, and computer concepts, and communication concepts are stated. Local and central controllers are described, as well as display, television and driver information systems. Available systems technology and candidate system definition, evaluation and implementation are also covered. The management of traffic control systems is discussed.
Author : Brian Ray
Publisher : Transportation Research Board
ISBN 13 : 0309099358
Total Pages : 110 pages
Book Rating : 4.3/5 (9 download)
Download or read book Guidelines for Selection of Speed Reduction Treatments at High-speed Intersections written by Brian Ray and published by Transportation Research Board. This book was released on 2008 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB¿s National Cooperative Highway Research Program (NCHRP) Report 613: Guidelines for Selection of Speed Reduction Treatments at High-Speed Intersections explores the effectiveness of geometric design features as well as signage and pavement markings to reduce vehicle speeds at high-speed intersections.
Author : Dusan Teodorovic
Publisher : Routledge
ISBN 13 : 1317630904
Total Pages : 472 pages
Book Rating : 4.3/5 (176 download)
Download or read book Routledge Handbook of Transportation written by Dusan Teodorovic and published by Routledge. This book was released on 2015-08-20 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Routledge Handbook of Transportation offers a current and comprehensive survey of transportation planning and engineering research. It provides a step-by-step introduction to research related to traffic engineering and control, transportation planning, and performance measurement and evaluation of transportation alternatives. The Handbook of Transportation demonstrates models and methods for predicting travel and freight demand, planning future transportation networks, and developing traffic control systems. Readers will learn how to use various engineering concepts and approaches to make future transportation safer, more efficient, and more sustainable. Edited by Dušan Teodorović and featuring 29 chapters from more than 50 leading global experts, with more than 200 illustrations, the Routledge Handbook of Transportation is designed as an invaluable resource for professionals and students in transportation planning and engineering.
Author :
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.3/5 (555 download)
Download or read book Selection of Traffic Signal Control and Timing at Individual Intersections written by and published by . This book was released on 1980 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Prahlad D. Pant
Publisher :
ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (664 download)
Download or read book Dilemma Zone Protection and Signal Coordination at Closely-spaced High-speed Intersections written by Prahlad D. Pant and published by . This book was released on 2006 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: A feasibility study of dilemma zone problems, performed by collecting and analyzing traffic flow data at a high-speed signalized intersection, showed that the maximum green extension or cutback needed to get a vehicle out of the dilemma zone is generally no more than two seconds. Scanning all vehicles on a link just seconds before the beginning of a yellow interval may extend or cut back the green interval so that vehicles can avoid the dilemma zone. For each vehicle approaching an intersection on a link about to turn yellow there is a time interval that (a) the vehicle will be in dilemma zone without green extension (or cutback) or (b) it will be in dilemma zone when there is T seconds of extension (or cutback). The task becomes to find the smallest nonnegative integer T that is not in any of these time intervals and extend or cutback the current interval by T seconds. This T can always be found and assuming there are no other restrictions, dilemma zones can be avoided and the extension or cutback is done at most once for each green interval. The simulation study, performed by modifying the source codes of NETSIM, showed that the signal timing generated by a bandwidth maximization program (PASSER II) resulted in a lower number of vehicles in dilemma zone than that generated by a delay minimization program (TRANSYT-7F). Additionally, the signal timing generated by the combination of the two programs, that is, by minimizing delay within the constraint of bandwidth maximization, resulted in even lower number of vehicles in dilemma zone than those generated by each program alone. The technique developed in this study can be implemented if the speeds and positions of all vehicles in the roadway can be recorded at small time intervals (e.g., 1 sec.). Recommendations are made for implementing and testing the developed technique.
Author :
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.3/5 (555 download)
Download or read book Field Testing and Implementation of Dilemma Zone Protection and Signal Coordination at Closely-spaced High-speed Intersections written by and published by . This book was released on 2005 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, high speed signalized intersections have reported many crashes and have always posed a challenge to traffic engineers for enhancing safety at these intersections. The area close to the intersection, called the dilemma zone, poses a high accident potential for the driver in stopping safely during the yellow interval or in proceeding through the intersection before the beginning of red. The driver is in a potentially hazardous situation whereby, if he tries to cross the intersection at the onset of red interval, he may end up in an angle accident with the cross street traffic or if he accelerates through yellow, he may end up in a rear-end collision. The uncertain situation in a dilemma zone can potentially lead to rear-end or right angle collisions.
Author :
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.3/5 (555 download)
Download or read book Vehicle detector placement for high-speed, isolated traffic-actuated intersection control written by and published by . This book was released on 1977 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Federal Highway Administration. Offices of Research and Development
Publisher :
ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.3/5 (91 download)
Download or read book Report No. FHWA-RD. written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1977 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 590 pages
Book Rating : 4.0/5 ( download)
Download or read book Current Literature in Traffic and Transportation written by and published by . This book was released on 1978 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daiheng Ni
Publisher : Springer Nature
ISBN 13 : 3030385493
Total Pages : 335 pages
Book Rating : 4.0/5 (33 download)
Download or read book Signalized Intersections written by Daiheng Ni and published by Springer Nature. This book was released on 2020-02-27 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook introduces the basics principles of intersection signalization including need studies, signal phasing, sequencing, timing, as well as more advanced topics such as detectors, controllers, actuated control schemes, and signal coordination. The book covers a variety of topics critical to the set up and operation of intersections controlled by traffic signals. Professor Ni imparts a basic understanding of how intersections work, what justifies intersection signalization, how to properly design phasing and timing plans for intersections, what is needed to run traffic-responsive signals, the workings of traffic controller cabinets, and how to set up signal coordination at multiple intersections—competencies essential to transportation professionals in charge of traffic operation at federal, state, and local levels. Aimed at students in transportation engineering programs with a focus on intersection signalization, the book is also ideal for researchers of traffic dynamics and municipal civil and transportation engineers.
