Safety Evaluation of Right Turns Followed by U-turns (4 Lanes Arterials) as an Alternative to Direct Left Turns PDF Download
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Author: Jian John Lu
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 260
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Book Description
Author: Jian John Lu
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 260
Get Book Here
Book Description
Author: Jian John Lu
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 244
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Book Description
Author: Jian John Lu
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 158
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Book Description
Author: Lu, Jian John Lu
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 172
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Book Description
Author:
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 230
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Book Description
Author:
Publisher:
ISBN:
Category : Left-turn lanes
Languages : en
Pages : 230
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Book Description
Author: Jian John Lu
Publisher:
ISBN:
Category : Driveways
Languages : en
Pages : 194
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Book Description
Florida increasingly uses restrictive medians and directional median openings on multi-lane highways to manage left turn egress maneuvers from driveways and side streets. By installing non-traversable medians and replacing full median openings with directional median openings at various locations, Florida prohibits direct left-turn exits onto some major arterials. The purpose of this research was to evaluate how the offset distance between driveway exits and downstream median openings or signalized intersections impacts traffic operational and safety performance. The primary objective is to determine optimum offset distances to facilitate driver use of Right Turn Followed by a U-Turn (RTUT) maneuvers, specifically investigating (1) traffic operational performance, based on the evaluation of vehicle travel time at various offset distances, and (2) safety performance, based on the evaluation of traffic conflicts and crash data. The focus of this research was on urban or suburban multi-lane divided arterials. Researchers studied the impacts of offset distance under four different scenarios: 4-lane divided roadways accommodating U-turns at median openings, 4-lane divided roadways accommodating U-turns at signalized intersections, 6 or more-lane divided roadways accommodating U-turns at median openings, and 6 or more-lane divided roadways accommodating U-turns at signalized intersections.
Author:
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 222
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Book Description
This research evaluated operational, safety, and perceived effects of superstreets, called restricted crossing U-turn intersections by FHWA, and developed a useful level of service (LOS) estimation program which could be used on North Carolina's urban and rural arterial roadway system. The operational analysis involved calibrating and validating VISSIM models of three existing signalized superstreets in North Carolina: two isolated intersections, and one five-intersection superstreet corridor. Results from the three models were compared to results from models of equivalent conventional intersections at various volume levels using travel time as the main measure of effectiveness.
Author: Ingrid B. Potts
Publisher: Transportation Research Board
ISBN: 0309088054
Category : Median strips
Languages : en
Pages : 142
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Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 524: Safety of U-Turns at Unsignalized Median Openings includes recommended guidelines for locating and designing unsignalized median openings, and a methodology for comparing the relative safety performance of different designs"--Publisher's description.
Author: Vergil G. Stover
Publisher:
ISBN:
Category : Architecture
Languages : en
Pages : 696
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Book Description
