Evaluation Of Detection And Signing Systems For High Speed Signalized Intersections
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Evaluation Of Detection And Signing Systems For High Speed Signalized Intersections
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Author : Prahlad D. Pant
language : en
Publisher:
Release Date : 1996
Evaluation Of Detection And Signing Systems For High Speed Signalized Intersections written by Prahlad D. Pant and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Electronic traffic controls categories.
The effects of two dynamic signs that begin to flash a few seconds before the onset of the yellow interval and a static sign that flashes all the time were examined at tangent and curved approaches to rural, high speed signalized intersections. The dynamic signs included (a) a PTSWF (prepare to stop when flashing) sign, and (b) a FSSA (flashing symbolic signal ahead) sign with green, yellow, and red circles. The static sign was a CFSSA (continuously flashing symbolic signal ahead) sign with the three circles. The effects of these signs on vehicular speeds at different segments of the intersection approach including the dilemma zone were analyzed as were the vehicle conflict rates and the responses from the drivers' surveys.
Evaluation Of Detector Placement For High Speed Approaches To Signalized Intersections
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Author : Dan R. Middleton
language : en
Publisher:
Release Date : 1997
Evaluation Of Detector Placement For High Speed Approaches To Signalized Intersections written by Dan R. Middleton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Detectors categories.
Fhwa Nationally Coordinated Program Of Highway Research Development And Technology Annual Progress Report Fiscal Year 1991
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Author :
language : en
Publisher:
Release Date : 1991
Fhwa Nationally Coordinated Program Of Highway Research Development And Technology Annual Progress Report Fiscal Year 1991 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Fhwa Nationally Coordinated Program Of Highway Research Development And Technology Progress Report 1987
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Author :
language : en
Publisher:
Release Date : 1987
Fhwa Nationally Coordinated Program Of Highway Research Development And Technology Progress Report 1987 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
Nationally Coordinated Program Of Highway Research Development And Technology
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Author :
language : en
Publisher:
Release Date : 1987
Nationally Coordinated Program Of Highway Research Development And Technology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Highway engineering categories.
Dilemma Zone Protection And Signal Coordination At Closely Spaced High Speed Intersections
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Author : Prahlad D. Pant
language : en
Publisher:
Release Date : 2001
Dilemma Zone Protection And Signal Coordination At Closely Spaced High Speed Intersections written by Prahlad D. Pant and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Electronic traffic controls categories.
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.
Evaluation Of Advance Warning Signals On High Speed Signalized Intersections
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Author : Peter T. Martin
language : en
Publisher:
Release Date : 2003
Evaluation Of Advance Warning Signals On High Speed Signalized Intersections written by Peter T. Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Electronic traffic controls categories.
Highway Planning And Research Program
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Author :
language : en
Publisher:
Release Date : 1990
Highway Planning And Research Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Highway planning categories.
Intersection Decision Support
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Author :
language : en
Publisher:
Release Date : 2006
Intersection Decision Support written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Decision support systems categories.
This project entailed the design, development, testing, and evaluation of intersection decision support (IDS) systems to address straight crossing path (SCP) intersection crashes. This type of intersection crash is responsible for more than 100,000 crashes and thousands of fatalities each year. In developing these IDS systems for both signalized and stop-controlled intersections, a top-down systems approach was used that determined the necessary system functions and evaluated the capability of different technologies to perform those functions. Human factors tests were also conducted that evaluated the effectiveness of warning algorithms and infrastructure-based driver-infrastructure interfaces in eliciting a stopping response from drivers about to be involved in an SCP intersection crash. Results indicated that further technological development is needed for the sensing and intersection state IDS functions. Furthermore, infrastructure-based warning interfaces tested were greatly outperformed by previously-tested in-vehicle warnings. Thus, future research on IDS systems should focus on their infrastructure-cooperative configuration, where the system supports an in-vehicle warning.
Advance Detection On High Speed Signalized Intersection Approaches
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Author : Patrick T. McCoy
language : en
Publisher:
Release Date : 2002
Advance Detection On High Speed Signalized Intersection Approaches written by Patrick T. McCoy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Electronic traffic controls categories.