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Unfortunately, these inspections disturb the normal traffic operation, especially in networks with intense traffic; are generally carried out only a few times per year; and, consequently, do not provide prompt identification of critical situations. Considering the recent developments and cost reduction in sensing capabilities of smartphones, the authors present an approach to use these technologies to perform constant acceleration measurements inside in\u2010service trains to complement the assessment of the structural performance and geometrical degradation of the tracks. Cross\u2010correlation values above 0.85 were obtained between the standard deviations of the longitudinal level and the experimental vertical accelerations measured on\u2010board a passenger train on an 11\u2010km railway stretch. The results showed that the approach can be used to identify critical situations that affect the performance of the track, regarding passenger comfort, degradation rates, and risk of derailment. It may comprise a low\u2010cost and crowdsourced complement to the general current practice of track geometric inspection by dedicated vehicles and contribute to an earlier detection of track malfunctions, consequently, to a more efficient maintenance planning and infrastructure management.<\/jats:p>","DOI":"10.1155\/2019\/1729153","type":"journal-article","created":{"date-parts":[[2019,2,12]],"date-time":"2019-02-12T23:31:25Z","timestamp":1550014285000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Smartphone\u2019s Sensing Capabilities for On\u2010Board Railway Track Monitoring: Structural Performance and Geometrical Degradation Assessment"],"prefix":"10.1155","volume":"2019","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1665-7037","authenticated-orcid":false,"given":"Andr\u00e9","family":"Paix\u00e3o","sequence":"first","affiliation":[]},{"given":"Eduardo","family":"Fortunato","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Cal\u00e7ada","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2019,2,12]]},"reference":[{"key":"e_1_2_12_1_2","doi-asserted-by":"publisher","DOI":"10.1680\/tgasm.20139"},{"key":"e_1_2_12_2_2","volume-title":"Modern Railway Track","author":"Esveld C.","year":"2001"},{"key":"e_1_2_12_3_2","doi-asserted-by":"publisher","DOI":"10.1201\/b10861"},{"key":"e_1_2_12_4_2","doi-asserted-by":"publisher","DOI":"10.1006\/jsvi.2002.5107"},{"key":"e_1_2_12_5_2","unstructured":"DahlbergT. 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