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| Construction of a roundabout at Womack Street and the Georgia Road. (April 2019) Photo by Bobby Coggins for Macon Media. © 2019 All Rights Reserved |
Since the construction of four new roundabouts in the Franklin area over the next year or two will bring the total number of local roundabouts to six, here is another reminder of how to proceed through these type of intersections and some of the benefits as touted by the North Carolina Department of Transportation.
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NCDOT Roundabouts
Here is a video released today by the NCDOT detailing how to use them and the safety benefits.
The following is from a brochure published by the NCDOT detailing results of a roundabout study.
Roundabout Evaluation
NCDOT completed a safety study of 30 intersections in North Carolina where a roundabout was installed. Many of the study locations were installed for operational or traffic calming purposes, although a handful were installed specifically for safety reasons.
Background
The study includes a diverse group of intersections where a roundabout was installed in urban, suburban, and rural areas. Intersections with a range of volumes and approach speeds are included. The study is comprised of locations converted from two‐way stop sign control to a roundabout, or from signalization to a roundabout. The roundabout size varies at the study locations, from an inscribed circle diameter of approximately 50 feet to over 130 feet. The study focuses on single lane roundabouts; only one site uses a multi‐lane configuration.
The purpose of the evaluation is to measure changes in total intersection crashes; fatal and injury crashes; and frontal impact crashes after intersections were converted to roundabouts.
Results
The overall results from all study locations indicate a:
•46% Reduction in Total Crashes,
•75% Reduction in Fatal and Injury Crashes, and
•76% Reduction in Frontal Impact Crashes.
Other key points of the study:
•There appears to be an even greater reduction in Total Crashes at the higher speed (45-55 mph) treatment sites.
•The reductions in Total Crashes were similar regardless of whether the intersection has three legs or four legs.
•The reductions in Total Crashes were similar regardless of whether the before control was a two‐way stop or a traffic signal.
The NCDOT also made a presentation about roundabouts at a Mayors Meeting of the Southwestern Commission at the town hall in Franklin in December of 2016. [LINK]
How not use a roundabout
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Published at 12:20pm on Monday, April 22, 2019
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