New Type of Roundabout: Roundabout with “Depressed” Lanes for Right Turning – “Flower Roundabout”

  • Tomaž Tollazzi
  • Marko Renčelj
  • Sašo Turnšek

Abstract

Recently, many of the foreign traffic-safety analyses point out the low level of traffic safety in multi-lane roundabouts. This problem is resolved in several ways in different countries; however, the solution, whereby the number of conflict points is diminished (e.g. turbo roundabout) has proven to be the most successful. However, the turbo roundabout also has its deficiencies: it has conflict crossing points and larger reconstruction of the existing two-lane roundabout is needed when the turbo roundabout is to be implemented instead of the existing one. In the paper a new type of roundabout has been introduced; the roundabout with “depressed” lanes for right turning (“the flower-roundabout”). Financially speaking, the main advantage of the new type of roundabout is that it can be implemented within the dimensions of the already existing “normal” two-lane roundabout. From the traffic-safety point of view, the main advantage of the new type of roundabout is that it has no crossing conflict points. KEYWORDS: traffic safety, roundabout, turbo roundabout, roundabout with “depressed” lanes for right turn
Published
2012-01-26
How to Cite
1.
Tollazzi T, Renčelj M, Turnšek S. New Type of Roundabout: Roundabout with “Depressed” Lanes for Right Turning – “Flower Roundabout”. PROMET [Internet]. 2012Jan.26 [cited 2019Dec.15];23(5):353-8. Available from: http://traffic.fpz.hr/index.php/PROMTT/article/view/153
Section
Articles