engleski

An International Review of Roundabout Geometry, Traffic Efficiency, Safety, Multi-criteria and Multi-objective Optimization Modelling

Studying and implementing state-of-the-art roundabouts requires optimizing traffic (operational) efficiency (TE) and traffic safety (TS) while considering geometric factors, traffic characteristics and local constraints. Most existing simulation-based optimization models do not simultaneously optimize all these factors. Here we describe and analyse a recent overview of state-of-the- art roundabout geometry, TE, TS, multi-criteria (MCDM) and multi-objective (MOO) optimization models. It also gives a brief literature overview on roundabout design, TE and TS in Croatia. This review findings suggest that it is necessary to develop a MOO model that can simultaneously optimize a set of various design and traffic parameters according to given constraints. Also needed is an MCDM model that can quantify how much certain geometric elements of roundabouts affect TE and TS parameters, and that allows optimization of those elements during design and modeling. Such a next- generation model should take better account of local conditions and traffic dynamics than existing simulation models do. Development and validation of such methods would be useful to better understand the TE and TS parameters for Croatian conditions or other. These models with its criteria weighting structure may help policy makers, civil and traffic road engineers to select appropriate roundabout design for implementation.

roundabout geometry design ; traffic (operational) efficiency ; traffic safety ; multi-criteria optimization ; multi-objective optimization

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