Operational and Safety Management at Intersections: Can the Turbo-Roundabout Be an Effective Alternative to Conventional Solutions?

Vincenzo Gallelli, Giusi Perri and Rosolino Vaiana
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Vincenzo Gallelli: Department of Civil Engineering, University of Calabria, Arcavacata Campus (CS), 87036 Arcavacata, Italy
Giusi Perri: Department of Civil Engineering, University of Calabria, Arcavacata Campus (CS), 87036 Arcavacata, Italy
Rosolino Vaiana: Department of Civil Engineering, University of Calabria, Arcavacata Campus (CS), 87036 Arcavacata, Italy

Sustainability, 2021, vol. 13, issue 9, 1-15

Abstract: The European Union policy strategies on the sustainability of the transport system pursue the goals of maximizing safety and environmental benefits and reducing the severity and frequency of crashes, congestion, and pollutant emission rates. A common issue is the planning of the most effective solution for operational and safety management at intersections. In this study, an egg turbo roundabout is proposed as the alternative solution to a conventional roundabout in Southern Italy which suffers from traffic congestion. A comparative analysis is carried out using microsimulation techniques to investigate the safety effects and operational improvements of converting a traditional priority intersection into standard roundabout or turbo roundabout layout. In particular, the VISSIM software is used to explore the most relevant operational performance measures: queue length, travel times and delays. The lowest values of these measurements are recorded for the simulated turbo roundabout, thus making this scheme more appropriate in terms of operational performances. With regard to safety analysis, the Surrogate Safety Assessment Model (SSAM) is used to collect information on the predicted number of conflicts, the probability, and severity of the potential collisions. The results suggest that, for the specific case study, the safety levels of the standard roundabout and the turbo roundabout are approximately comparable.

Keywords: turbo roundabout; microsimulation; surrogate safety parameters (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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