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This paper aims to integrate the traffic features extracted from the wireless communication records and the measurements from the microwave sensors for the state estimation. A state\u2010space model and a Progressive Extended Kalman Filter (PEKF) method are proposed. The results from the field test exhibit that the proposed method efficiently fuses the heterogeneous multisource data and adaptively tracks the variation of traffic conditions. The proposed method is satisfactory and promising for future development and implementation.<\/jats:p>","DOI":"10.1155\/2018\/6745726","type":"journal-article","created":{"date-parts":[[2018,5,6]],"date-time":"2018-05-06T23:31:35Z","timestamp":1525649495000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["A Progressive Extended Kalman Filter Method for Freeway Traffic State Estimation Integrating Multisource Data"],"prefix":"10.1155","volume":"2018","author":[{"given":"Yingshun","family":"Liu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8099-7928","authenticated-orcid":false,"given":"Shanglu","family":"He","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5464-0930","authenticated-orcid":false,"given":"Bin","family":"Ran","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9210-1612","authenticated-orcid":false,"given":"Yang","family":"Cheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,5,6]]},"reference":[{"key":"e_1_2_9_1_2","article-title":"Extended Kalman Filter-based Freeway Traffic State Estimation Using Cellphone Activity Data","author":"He S.","year":"2016","journal-title":"in Transportation Research Board 95th Annual Meeting"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trc.2015.07.005"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trb.2004.03.003"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1115\/1.3662552"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1002\/atr.1292"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trc.2006.06.001"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.1287\/trsc.1070.0194"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.tra.2008.06.001"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1080\/15472450.2013.773225"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.automatica.2008.05.019"},{"key":"e_1_2_9_11_2","article-title":"Neural network based freeway traffic state data fusion system using cellular handoff probe system and microwave sensors","author":"He S.","year":"2015","journal-title":"in Transportation Research Board 94th Annual Meeting"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trc.2012.07.003"},{"key":"e_1_2_9_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trc.2013.05.012"},{"key":"e_1_2_9_14_2","doi-asserted-by":"crossref","unstructured":"El FaouziN.-E. 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