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We highlight the effect of bunching swings, and show that this phenomenon can be extracted using unsupervised machine learning techniques, namely clustering. We also show the correlation between bunching rate and passenger load, and bunching probability patterns for working days and weekends. We present the approach for extracting isolated bunching swings formations (BSF) and show different cases of BSFs, some of which can persist for a considerable time. We applied our approach to the tram line 1 of The Hague, and computed and presented four different patterns of BSFs, which we name \u201chigh passenger load\u201d, \u201cwhole route\u201d, \u201cevening, end of route\u201d, \u201clong duration\u201d. We analyse each bunching swings formation type in detail.<\/jats:p>","DOI":"10.1007\/s12469-020-00251-z","type":"journal-article","created":{"date-parts":[[2020,9,7]],"date-time":"2020-09-07T11:02:37Z","timestamp":1599476557000},"page":"533-555","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Unsupervised approach towards analysing the public transport bunching swings formation phenomenon"],"prefix":"10.1007","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7054-3770","authenticated-orcid":false,"given":"Viktoriya","family":"Degeler","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L\u00e9onie","family":"Heydenrijk-Ottens","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ding","family":"Luo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niels","family":"van Oort","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hans","family":"van Lint","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2020,9,7]]},"reference":[{"key":"251_CR1","doi-asserted-by":"publisher","first-page":"123","DOI":"10.1016\/j.trb.2017.06.013","volume":"104","author":"M Andres","year":"2017","unstructured":"Andres M, Nair R (2017) A predictive-control framework to address bus bunching. 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