PERFORMANCE CHECKS AS PREREQUISITES FOR ENVIRONMENTAL BENEFITS OF ROUNDABOUTS

3rd International Conference on Road and Rail Infrastructure (CETRA 2014)

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Field Value
 
Title PERFORMANCE CHECKS AS PREREQUISITES FOR ENVIRONMENTAL BENEFITS OF ROUNDABOUTS
 
Creator Saša Ahac; University of Zagreb, Faculty of Civil Engineering, Department for Transportation
Tamara Džambas; University of Zagreb, Faculty of Civil Engineering, Department for Transportation
Ivica Stančerić; University of Zagreb, Faculty of Civil Engineering, Department for Transportation
Vesna Dragčević; University of Zagreb, Faculty of Civil Engineering, Department for Transportation
 
Subject roundabout design, offtracking control, fastest path, visibility
 
Description Environmental benefits of roundabouts are well known: roundabouts help reduce fuel consumption and vehicle emissions and also require less maintenance than traditional intersections with traffic signals, providing a reduction in energy use and costs. The prerequisite for
these assets is smooth speed profile through the roundabout, which is achieved by ensuring the clarity of the situation for approaching drivers, visibility between road users, comprehensibility of traffic operations and appropriate accommodation of the design vehicles. These requirements are met through quality roundabout design. Roundabout design is an iterative process that consists of identification of initial design elements, performance checks (definition
of fastest path, offtracking geometry and visibility tests) and final design details. The development of reliable software for vehicle movement simulations simplified these performance checks, and led to the exploration of new possibilities for roundabout design, which
represents a logical step in the area of road traffic engineering research. In Croatia the positive aspects of roundabouts are often annulled due to their inappropriate design. Namely, performance checks that should ensure proper speed profile and required
intersection visibility are usually ignored. The main reason for this stems from the fact that there are no official national guidelines or regulations for the roundabout design. In this paper key elements for successful roundabout design will be shown, based on performance checks conducted by vehicle movement simulation software. Proposed instructions could be used for the development of national guidelines for roundabout design.
 
Publisher CETRA 2014
 
Contributor
 
Date 2017-02-28 16:47:18
 
Type Peer-reviewed Paper
 
Identifier http://master.grad.hr/cetra/ocs/index.php/cetra3/cetra2014/paper/view/442
 
Source CETRA 2014; 3rd International Conference on Road and Rail Infrastructure
 
Language en
 
Rights <p>Authors who submit to this conference agree to the following terms:<br /> <strong>a)</strong> Authors retain copyright over their work, while allowing the conference to place this unpublished work under a <a href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a>, which allows others to freely access, use, and share the work, with an acknowledgement of the work's authorship and its initial presentation at this conference. <br /> <strong>b)</strong> Submitted full papers will be published in the book of proceedings "Road and Rail Infrastructure II" as well as in digital form (on a CD). Conference organiser is allowed to publish author's names, institution and country as well as the paper abstract on the conference web site.</p>
 

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