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However, assessing bridges is a complex task, which requires a comprehensive understanding of the phenomenon. This literature review first presents recent scour detection techniques and approaches. Direct and indirect monitoring and machine learning algorithm-based studies are investigated in detail in the following sections. The approaches, models, characteristics of data, and other input properties are outlined. The outcomes are given with their advantages and limitations. Finally, assessments are provided at the synthesis of the research.<\/jats:p>","DOI":"10.3390\/app13031661","type":"journal-article","created":{"date-parts":[[2023,1,30]],"date-time":"2023-01-30T02:28:34Z","timestamp":1675045714000},"page":"1661","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Scour Detection with Monitoring Methods and Machine Learning Algorithms\u2014A Critical Review"],"prefix":"10.3390","volume":"13","author":[{"given":"Sinem","family":"Tola","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, University of Minho, ISISE, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6824-5221","authenticated-orcid":false,"given":"Joaquim","family":"Tinoco","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, University of Minho, ISISE, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1536-2149","authenticated-orcid":false,"given":"Jos\u00e9 C.","family":"Matos","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, University of Minho, ISISE, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6867-1009","authenticated-orcid":false,"given":"Eugene","family":"Obrien","sequence":"additional","affiliation":[{"name":"School of Civil Engineering, University College Dublin, D04 V1W8 Dublin, Ireland"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zhao, M. 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