Visibility And Spacing Of Lane Control Signals For Freeway Traffic Management
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Visibility Spacing And Operation Of Freeway Lane Control Signals
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Author :
language : en
Publisher:
Release Date : 1996
Visibility Spacing And Operation Of Freeway Lane Control Signals written by 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.
This report summarizes the research performed and documented in interim project reports to address visibility, spacing, and operational issues pertaining to lane control signals (LCSs) used for freeway traffic management in Texas. Chapters in this final report review the results of legibility studies of new and used LCSs; a TxDOT expert panel meeting to address LCS visibility, spacing, and mounting location issues; and an evaluation of yellow diagonal and downward arrows for freeway traffic management purposes. The final chapter summarizes the findings and recommendations resulting from this research effort.
Visibility And Spacing Of Lane Control Signals For Freeway Traffic Management
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Author : Gerald L. Ullman
language : en
Publisher:
Release Date : 1994
Visibility And Spacing Of Lane Control Signals For Freeway Traffic Management written by Gerald L. Ullman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Electronic traffic controls categories.
Glance legibility studies conducted at the TTI Proving Grounds examined the legibility of three commercially available lane control signals (LCS) with respect to symbol, signal type, subject gender, and subject age. Also, the effect of ambient light conditions was also explored. Symbols on all three signals resulted in median glance legibility distances of 304.8 meters (1000 feet) or greater, whereas the 85th percentile glance legibility distance was 213.4 meters (700 feet) or greater. Of the various factors examined, only the age of the subject significantly influenced legibility distances. In general, drivers 65 years and older had to be 91.5 to 198.1 meters (300 to 650 feet) closer to the signals to correctly identify the symbols being displayed than drivers aged 16 to 44 years. The report also contains the results of a meeting of TxDOT operations personnel involved in freeway LCS design and operaion. Panel members identified a number of specific problems and concerns regarding LCS design and operation. Panel members identified a number of specific problems and concerns regarding LCS on freeways, and brainstormed about potential solutions and countermeasures to address these concerns.
Traffic Management System Considerations In Freeway Design And Redesign
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Author : Gerald L. Ullman
language : en
Publisher:
Release Date : 1996
Traffic Management System Considerations In Freeway Design And Redesign written by Gerald L. Ullman 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 control categories.
Guidelines For Design And Operation Of Nighttime Traffic Control For Highway Maintenance And Construction
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Author : James E. Bryden
language : en
Publisher: Transportation Research Board
Release Date : 2002
Guidelines For Design And Operation Of Nighttime Traffic Control For Highway Maintenance And Construction written by James E. Bryden and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Automobile driving at night categories.
Yellow Transition Lane Control Signal Symbols For Freeway Traffic Management
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Author :
language : en
Publisher:
Release Date : 1996
Yellow Transition Lane Control Signal Symbols For Freeway Traffic Management written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Automobile drivers categories.
This report documents the research performed to assess the effectiveness and applicability of yellow diagonal and downward arrows for freeway traffic management purposes. Researchers examined motorist understanding of and perceived usefulness of the arrows through surveys of San Antonio motorists where these indications are being utilized as part of the TransGuide system. These results were compared to similar data obtained from motorists in Fort Worth where Texas Department of Transportation operates a traffic management system utilizing a yellow X. Researchers also interviewed operators of the TransGuide system to assess their opinions of the yellow arrow indications, and to identify any difficulties they have experienced in utilizing these symbols in their daily traffic management activities. Finally, researchers performed a series of field studies to assess how drivers respond to yellow diagonal arrows and yellow Xs used to transition between a lane open and a lane closed condition. Data collected through this research effort indicates that the use of both the yellow diagonal and downward arrows for freeway traffic management purposes are perceived positively by TransGuide system operators and the motoring public. Furthermore, no evidence of operational problems or difficulties due to the use of either of these non-standard symbols has been collected through field studies in San Antonio. Similar statements can be made concerning the yellow X. Motorists in Fort Worth rate this symbol fairly highly once they see it used in a freeway driving situation. Field studies suggest that the number of drivers exiting a closed lane when first encountering the yellow X symbol equals or exceeds those who would exit for the yellow diagonal arrow.
Traffic Control Devices And Highway Visibility
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Author :
language : en
Publisher:
Release Date : 1992
Traffic Control Devices And Highway Visibility written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Technology & Engineering categories.
Operation Of Lane Control Signals For Freeway Traffic Management
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Author : Gerald L. Ullman
language : en
Publisher:
Release Date : 1993
Operation Of Lane Control Signals For Freeway Traffic Management written by Gerald L. Ullman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Electronic traffic controls categories.
Manual On Uniform Traffic Control Devices For Streets And Highways
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Author : United States. National Advisory Committee on Uniform Traffic Control Devices
language : en
Publisher:
Release Date : 1978
Manual On Uniform Traffic Control Devices For Streets And Highways written by United States. National Advisory Committee on Uniform Traffic Control Devices and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Traffic regulations categories.
Manual On Uniform Traffic Control Devices For Streets And Highways
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Author :
language : en
Publisher:
Release Date : 1978
Manual On Uniform Traffic Control Devices For Streets And Highways written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Electronic traffic controls categories.
Traffic Signs Manual
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Author : Great Britain: Department for Transport
language : en
Publisher: The Stationery Office
Release Date : 2006-06-30
Traffic Signs Manual written by Great Britain: Department for Transport and has been published by The Stationery Office this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-06-30 with Law categories.
Part 1 Design is also available (ISBN 0115527389).