{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T14:43:08Z","timestamp":1780497788616,"version":"3.54.1"},"reference-count":81,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,4,21]],"date-time":"2021-04-21T00:00:00Z","timestamp":1618963200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Spanish Goverment","award":["PID2019-104793RB-C31"],"award-info":[{"award-number":["PID2019-104793RB-C31"]}]},{"name":"Spanish Goverment","award":["RTI2018-096036-B-C21"],"award-info":[{"award-number":["RTI2018-096036-B-C21"]}]},{"name":"Madrid Community","award":["SEGVAUTO-4.0-CM P2018\/EMT-4362"],"award-info":[{"award-number":["SEGVAUTO-4.0-CM P2018\/EMT-4362"]}]},{"name":"Universidad Carlos III de Madrid","award":["PEAVAUTO-CM-UC3M"],"award-info":[{"award-number":["PEAVAUTO-CM-UC3M"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Human\u2013machine interaction is an active area of research due to the rapid development of autonomous systems and the need for communication. This review provides further insight into the specific issue of the information flow between pedestrians and automated vehicles by evaluating recent advances in external human\u2013machine interfaces (eHMI), which enable the transmission of state and intent information from the vehicle to the rest of the traffic participants. Recent developments will be explored and studies analyzing their effectiveness based on pedestrian feedback data will be presented and contextualized. As a result, we aim to draw a broad perspective on the current status and recent techniques for eHMI and some guidelines that will encourage future research and development of these systems.<\/jats:p>","DOI":"10.3390\/s21092912","type":"journal-article","created":{"date-parts":[[2021,4,21]],"date-time":"2021-04-21T21:25:10Z","timestamp":1619040310000},"page":"2912","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":85,"title":["eHMI: Review and Guidelines for Deployment on Autonomous Vehicles"],"prefix":"10.3390","volume":"21","author":[{"given":"Juan","family":"Carmona","sequence":"first","affiliation":[{"name":"Intelligent Systems Lab, Universidad Carlos III de Madrid, 28903 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1300-3879","authenticated-orcid":false,"given":"Carlos","family":"Guindel","sequence":"additional","affiliation":[{"name":"Intelligent Systems Lab, Universidad Carlos III de Madrid, 28903 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6291-5009","authenticated-orcid":false,"given":"Fernando","family":"Garcia","sequence":"additional","affiliation":[{"name":"Intelligent Systems Lab, Universidad Carlos III de Madrid, 28903 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2618-857X","authenticated-orcid":false,"given":"Arturo","family":"de la Escalera","sequence":"additional","affiliation":[{"name":"Intelligent Systems Lab, Universidad Carlos III de Madrid, 28903 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Bevan, N., Carter, J., Earthy, J., Geis, T., Harker, S., Bevan, N., Carter, J., Earthy, J., Geis, T., and Harker, S. 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