{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T19:07:39Z","timestamp":1777921659299,"version":"3.51.4"},"reference-count":32,"publisher":"SAGE Publications","issue":"25","license":[{"start":{"date-parts":[[2018,5,22]],"date-time":"2018-05-22T00:00:00Z","timestamp":1526947200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Transportation Research Record: Journal of the Transportation Research Board"],"published-print":{"date-parts":[[2018,12]]},"abstract":"<jats:p>Roundabouts are increasingly being used on busy arterial streets for traffic calming purposes. However, if one roundabout leg is near a distribution hub, for example, parking areas of shopping centers, the entry traffic volumes will be particularly high in peak hours. This paper investigated a partial-metering-based strategy to reduce traffic-related costs in a corridor. Specifically, the resulting traffic performance, energy, environmental, and exposure impacts associated with access roundabouts were studied in an urban commercial area, namely: (a) to characterize corridor operations in terms of link-specific travel time, fuel consumption, carbon dioxide and nitrogen oxides emissions, and noise costs; (b) to propose an optimization model to minimize these outputs; and (c) to demonstrate the model applicability under different traffic demand and directional splits combinations. Traffic, noise, and vehicle dynamics data were collected from a corridor with roundabouts and signalized intersections near a commercial area of Guimar\u00e3es, Portugal. Microscopic traffic and emission modeling platforms were used to model traffic operations and estimate pollutant emissions, respectively. Traffic noise was estimated with a semi-dynamical model. Link-based cost functions were developed based on the integrated modeling structure. Lastly, a sequential quadratic programming-type approach was applied to find optimal timing settings. The benefit of the partial-metering system, in terms of costs, could be up to 13% with observed traffic volumes. The efficiency of the proposed system increased as entering traffic at the metered approaches increased (~7% less costs). The findings enable quantification of metering benefits near shopping areas.<\/jats:p>","DOI":"10.1177\/0361198118774667","type":"journal-article","created":{"date-parts":[[2018,5,22]],"date-time":"2018-05-22T15:30:59Z","timestamp":1527003059000},"page":"21-34","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":17,"title":["The Potential of Metering Roundabouts: Influence in Transportation Externalities"],"prefix":"10.1177","volume":"2672","author":[{"given":"Paulo","family":"Fernandes","sequence":"first","affiliation":[{"name":"Department Mechanical Engineering\/Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Aveiro, Portugal"}]},{"given":"Jo\u00e3o","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Department Mechanical Engineering\/Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Aveiro, Portugal"}]},{"given":"Claudio","family":"Guarnaccia","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, University of Salerno, Fisciano (SA), Italy"}]},{"given":"Jorge M.","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Department Mechanical Engineering\/Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Aveiro, Portugal"}]},{"given":"Elo\u00edsa","family":"Macedo","sequence":"additional","affiliation":[{"name":"Department Mechanical Engineering\/Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Aveiro, Portugal"}]},{"given":"Margarida C.","family":"Coelho","sequence":"additional","affiliation":[{"name":"Department Mechanical Engineering\/Centre for Mechanical Technology and Automation (TEMA), University of Aveiro, Aveiro, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2018,5,22]]},"reference":[{"key":"bibr1-0361198118774667","unstructured":"Ariniello A. 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