Study of the Use of Warrants for the Installation of Left-turn Phasing at Signalized Intersections PDF Download
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Author: Institute of Transportation Engineers. Colorado Wyoming Section. Technical Committee
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 43
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Book Description
Author: Institute of Transportation Engineers. Colorado Wyoming Section. Technical Committee
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 43
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Book Description
Author: Kenneth R. Agent
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 48
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Author: Yi Qi
Publisher:
ISBN:
Category : Right-turn lanes
Languages : en
Pages : 126
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Book Description
Right-turn lanes provide space for the deceleration and storage of right-turn vehicles, and separate turning vehicles from through movements. Dual right-turn lanes are increasingly used at urban intersections primarily for two reasons: (1) to accommodate high right-turn demands and avoid turn-pocket overflows, and/or (2) to prevent right-turn vehicles that exit from a nearby upstream freeway off-ramp (on the left of the roadway) from abruptly changing too many lanes toward the right-turn lane at the intersection. In addition, a number of other factors may affect the decisions on the installation of dual right-turn lanes. However, warrants for dual right lane installation are almost non-existent, leaving traffic engineers to rely on engineering judgment. This research aims to develop warrants for installation of dual right-turn lanes at signalized intersections. Both the operational and safety benefits/costs were analyzed by surveying traffic engineers and by conducting traffic simulation-based analysis. Microscopic traffic simulation model, VISSIM, was used to quantify the operation benefits and Surrogate Safety Assessment Model (SSAM) developed by Siemens was used to analyze the safety gains due to installation of dual right-turn lanes.
Author:
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ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 50
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Author: Jonathan Upchurch
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 220
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Book Description
This study dealt with five types of left turn signal phasing: permissive, leading exclusive, lagging exclusive, leading exclusive/permissive, and lagging exclusive/permissive. The objectives of this research project were to: (1) develop a research work plan to conduct a statistically valid study for the development of numerical warrants for left turn movements; and (2) prepare a database of available information on signalized intersections and select the intersections to be used in the future study. This report describes the database of Arizona signalized intersections created in this project, the findings on left turn accident rates for different types of left turn phasing (using a nonrandom sample), and results of a validation study of the TEXAS computer simulation model. It also presents a research work plan for a future research project.
Author: Kenneth R. Agent
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Author: J. Edwin Clark
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 100
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Author:
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 232
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Author: Michael A. Perfater
Publisher:
ISBN:
Category : Automobile driving
Languages : en
Pages : 42
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More than 70% of motorists returning a questionnaire distributed for the study favored the exclusive/permissive signal, while about 17% said the signal reduced delays, and 30% said it created a hazard. Intersections with one or more right-turn-on-red movements seemed especially susceptible to vehicular conflicts. The ratios of accidents involving left-turning vehicles to all accidents at intersections appeared to increase after the E/P signals were installed.
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Category : Air travel
Languages : en
Pages : 600
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