{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T07:31:44Z","timestamp":1767339104098,"version":"build-2065373602"},"reference-count":78,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2022,9,3]],"date-time":"2022-09-03T00:00:00Z","timestamp":1662163200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Department of Engineering, University of Palermo, Italy","award":["POFESR2014-20_Sicily\u2014Sicilian Region\u2014PO FESR 2014\u20132020"],"award-info":[{"award-number":["POFESR2014-20_Sicily\u2014Sicilian Region\u2014PO FESR 2014\u20132020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Despite the potential of connected and automated vehicles (CAVs), there are still many open questions on how road capacity can be influenced and what methods can be used to assess its expected benefits in the progressive transition towards fully cooperative driving. This paper contributes to a better understanding of the benefits of CAV technologies by investigating mobility-related issues of automated vehicles operating with a cooperative adaptive cruise control system on roundabout efficiency using microscopic traffic simulation. The availability of the adjustment factors for CAVs provided by the 2022 Highway Capacity Manual allowed to adjust the entry capacity equations to reflect the presence of CAVs on roundabouts. Two mechanisms of entry maneuver based on the entry lane type were examined to compare the capacity target values with the simulated capacities. The microscopic traffic simulator Aimsun Next has been of great help in building the \u201cwhat-if\u201d traffic scenarios that we analysed to endorse hypothesis on the model parameters which affect the CAVs\u2019 capabilities to increase roundabouts\u2019 throughput. The results highlighted that the increasing penetration rates of CAVs have greater impacts on the operational performances of roundabouts, and provided a synthetic insight to assess the potential benefits of CAVs from an efficiency perspective.<\/jats:p>","DOI":"10.3390\/s22176670","type":"journal-article","created":{"date-parts":[[2022,9,8]],"date-time":"2022-09-08T04:18:32Z","timestamp":1662610712000},"page":"6670","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Simulation-Based Analysis of \u201cWhat-If\u201d Scenarios with Connected and Automated Vehicles Navigating Roundabouts"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3109-2118","authenticated-orcid":false,"given":"Maria Luisa","family":"Tumminello","sequence":"first","affiliation":[{"name":"Department of Engineering, University of Palermo, Viale delle Scienze ed 8, 90128 Palermo, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1345-0022","authenticated-orcid":false,"given":"El\u017cbieta","family":"Macioszek","sequence":"additional","affiliation":[{"name":"Department of Transport Systems, Traffic Engineering and Logistics, Faculty of Transport and Aviation Engineering, Silesian University of Technology, Krasi\u0144skiego 8 Street, 40-019 Katowice, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6976-0807","authenticated-orcid":false,"given":"Anna","family":"Gran\u00e0","sequence":"additional","affiliation":[{"name":"Department of Engineering, University of Palermo, Viale delle Scienze ed 8, 90128 Palermo, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8880-5932","authenticated-orcid":false,"given":"Tullio","family":"Giuffr\u00e8","sequence":"additional","affiliation":[{"name":"Faculty of Engineering and Architecture, University of Enna Kore, Viale della Cooperazione, 94100 Enna, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,3]]},"reference":[{"key":"ref_1","unstructured":"National Academies of Sciences, Engineering, and Medicine (2010). 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