Guide for the Analysis of Multimodal Corridor Access Management (2018) / Chapter Skim
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Pages 6-9
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6 Description Techniques in this group eliminate or reduce left-turn movements through a range of actions, including physically precluding left turns by constructing a non-traversable median and prohibiting left turns by installing regulatory signage. Vehicles that previously made a direct left turn must make a right turn followed by a U-turn (if exiting the access)
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From page 7... ...
Restrict Left-Turn Movements at an Access Point 7 Access Management Technique Performance Trends and Documented Performance Relationships Operations Safety Close existing median openings. Replace full median opening with one serving only left turns from the major roadway.
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From page 8... ...
8 Guide for the Analysis of Multimodal Corridor Access Management Under lower-volume conditions on 6- and 8-lane arterials, the average extra time to make a right-turn and U-turn movement was up to 30–40 seconds longer for driveway volumes of 50 and 150 vehicles/hour, respectively (6)
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From page 9... ...
Restrict Left-Turn Movements at an Access Point 9 • Access Management Application Guidelines: Chapter 17, U-Turn Lane Requirements. • NCHRP Report 420: Chapter 8, U-Turns as Alternatives to Direct Left Turns.
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