Intersection Modifications Using Mini-/Modular-Roundabouts

Naik, Bhaven; Dey, Kakan Chandra; Woo, Jeyoung; Roy, Amit Kumar; Hossein, Md Amdad; Bachy, Alex; Sperry, Benjamin R.; Ohio University. Department of Civil Engineering; West Virginia University. Department of Civil and Environmental Engineering; California State Polytechnic University, Pomona. Department of Civil Engineering

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Intersection Modifications Using Mini-/Modular-Roundabouts

2021-11-01
By Naik, Bhaven ; Dey, Kakan Chandra ; Woo, Jeyoung ; ...

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Creators:

Naik, Bhaven ; Dey, Kakan Chandra ; Woo, Jeyoung ; Roy, Amit Kumar ; Hossein, Md Amdad ; ... More +

Naik, Bhaven ; Dey, Kakan Chandra ; Woo, Jeyoung ; Roy, Amit Kumar ; Hossein, Md Amdad ; Bachy, Alex ; Sperry, Benjamin R. Less -
Corporate Creators:

Ohio University. Department of Civil Engineering ; West Virginia University. Department of Civil and Environmental Engineering ; California State Polytechnic University, Pomona. Department of Civil Engineering

Ohio University. Department of Civil Engineering ; West Virginia University. Department of Civil and Environmental Engineering ; California State Polytechnic University, Pomona. Department of Civil Engineering Less -
Corporate Contributors:

United States. Department of Transportation. Federal Highway Administration ; Ohio. Dept. of Transportation. Office of Statewide Planning and Research

United States. Department of Transportation. Federal Highway Administration ; Ohio. Dept. of Transportation. Office of Statewide Planning and Research Less -
Subject/TRT Terms:

[+]

Geometric Design Highway Safety Installation Intersection Control Intersections Life Cycle Analysis Life Cycle Costing Mini-Roundabouts Modular-Roundabouts Roundabouts
Publication/ Report Number:

FHWA/OH-2021-32
Resource Type:

Tech Report
Geographical Coverage:

Ohio ; United States

Ohio ; United States Less -
Edition:

Final Report
Corporate Publisher:

Ohio. Dept. of Transportation. Office of Statewide Planning and Research
Abstract:

Conversion of traditional intersections (stop controlled and signalized) to modern RABs has been a growing practice in many countries around the world including the U.S. – largely due to the benefits of reduction in crash frequency and severity, capacity improvement, and operational improvement. However, construction of traditional RABs is costly and requires additional right‐of‐way (ROW) which can deter roundabout installation on local transportation systems that have budgetary and/or available ROW restrictions. The main objective of this project was to develop guidelines for ORIL on the installation and performance of mini‐/modular‐RABs considering characteristics of Ohio’s local transportation system. Based on published guidelines and from existing pilot implementations (both international and within U.S.), current design practices considering traffic condition and roadway conditions were identified. Based on survey findings, there was a reasonably high level of familiarity with mini-RABs among respondents. Most agencies consider reduction of crashes/severity and improved traffic operations in installation of mini-RABs. Major concern with mini-RABs is drivers neglecting the central island and driving straight through thus causing the mini-/modular-RAB to lose its integrity. Agencies typically place mini-/modular-RABs on two-lane highways with low traffic volumes (<15,000 vpd); and/or peak-hour volumes of 1,600 to 1,800 vehicles. Based on driving simulator experiments, there are no differences in critical gap as driver’s maneuvered through mini-RAB of different ICDs. Operations-wise, Mini-RABs with larger ICDs performed better than those with smaller ICDs.
Format:

PDF
Funding:

33717
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:075aaaf7d002a6c6dab10053a25116cef2bc799bba4e9412c2de5d3d3481f1e6
Download URL:

https://rosap.ntl.bts.gov/view/dot/64259/dot_64259_DS1.pdf
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Intersection Modifications Using Mini-/Modular-Roundabouts

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