Title

Mini-Roundabouts For The United States And Traffic Capacity Models

Abstract

Design recommendations and an approach are provided to estimate traffic capacity of mini-roundabouts from sites in the US. Mini roundabouts are described by their inscribed circle diameter (ICD), which is the distance between the outer edges of the circular roadway. The design of a mini-roundabout needs to fit within existing boundaries, whether they are curb returns or edge of pavements with shoulder. The basic design of mini-roundabouts is determined by the swept paths of a passenger car for three maneuvers, such as through passage, right passage, and left-turn passage along the outer edges of the intersection. Inner edges of the swept paths determine the edge of the central island, which can be circular or elliptical depending on existing intersection layout. The circulatory roadway width should not be greater than 12 feet when the intersection is perpendicular. One of the unique features of the mini-roundabout is the ability for heavy vehicles to make left and through movements over the central and splitter islands.

Publication Date

11-1-2012

Publication Title

ITE Journal (Institute of Transportation Engineers)

Volume

82

Issue

11

Number of Pages

20-24

Document Type

Article

Personal Identifier

scopus

Socpus ID

84872145306 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84872145306

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