From:
Phillip Jordan
To: geno@ksu.edu
Subject: Roundabouts in State Drivers Manuals?
Date sent: May 15, 2003
Gene
Arrows on the approaches to roundabouts are not only good - they are almost essential. What other form of intersection control would we (engineers)leave the motorist to make up his/her own mind?? Why can we accept arrows at traffic signals, and yet at a roundabout (simply another form of intersection traffic control) we cannot. Thankfully, Australia came to grips with this issue about 8-10 years ago.
Attached is a diagram of a typical lanemarking for a 2 lane roundabout here in Victoria. These are standard markings now for Australia. I prefer to use a series of three sets of arrows per lane per approach - giving plenty of guidance to the motorist. The long held but never previously tested concern that drivers would turn right before the central island (ie and go the wrong way around at least a part of the roundabout) simply has not eventuated in those 8-10 years.
Phillip Jordan
PRINCIPAL ROAD SAFETY ENGINEER
phone +61 3 9854 2065
fax +61 3 9854 2668
email-Phil_Jordan@vrnotes.roads.vic.gov.au
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