Designs, Volume 5, Issue 1 (March 2021) – 24 articles
Cover Story (view full-size image): Turbo Roundabouts provide enhanced traffic safety compared to an ordinary multi-lane roundabout. Sight distance, a pivotal parameter in geometric design, has not been previously instigated for this type of roundabout. This paper presents the geometric characteristics of the knee turbo roundabout and models its intersection sight distance (ISD). ISD was modeled for an approaching vehicle at the yield line and at 15 m from the yield line. Design aids for ISD and lateral clearance requirements are presented. The developed analytical method was validated graphically. View this paper.
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