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In this scenario, the availability of information about such architectural elements (together with facilities) can greatly support citizens\u2019 mobility by enhancing their independence and their abilities in conducting daily outdoor activities. With this in mind, we have designed and developed mobile Pervasive Accessibility Social Sensing (mPASS), a system that provides users with personalized paths, computed on the basis of their own preferences and needs, with a customizable and accessible interface. The system collects data from crowdsourcing and crowdsensing to map urban and architectural accessibility by providing reliable information coming from different data sources with different levels of trustworthiness. In this context, reliability can be ensured by properly managing crowdsourced and crowdsensed data, combined when possible with authoritative datasets, provided by disability rights organizations and local authorities. To demonstrate this claim, in this article we present our trustworthiness model and discuss results we have obtained by simulations.<\/jats:p>","DOI":"10.1145\/3133327","type":"journal-article","created":{"date-parts":[[2017,10,26]],"date-time":"2017-10-26T14:19:33Z","timestamp":1509027573000},"page":"1-21","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":62,"title":["On the Need of Trustworthy Sensing and Crowdsourcing for Urban Accessibility in Smart City"],"prefix":"10.1145","volume":"18","author":[{"given":"Catia","family":"Prandi","sequence":"first","affiliation":[{"name":"University of Bologna, Bologna, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Silvia","family":"Mirri","sequence":"additional","affiliation":[{"name":"University of Bologna, Bologna, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefano","family":"Ferretti","sequence":"additional","affiliation":[{"name":"University of Bologna, Bologna, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paola","family":"Salomoni","sequence":"additional","affiliation":[{"name":"University of Bologna, Bologna, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2017,10,26]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/2107556.2107580"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/2414425.2414435"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10708-008-9182-4"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1109\/CCNC.2012.6181029"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/2461121.2461129"},{"key":"e_1_2_1_6_1","first-page":"595","article-title":"Road condition detection using smartphone sensors: A survey","volume":"7","author":"Chugh Gunjan","year":"2014","unstructured":"Gunjan Chugh , Divya Bansal , and Sanjeev Sofat . 2014 . 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