{"id":453,"date":"2026-05-26T21:38:17","date_gmt":"2026-05-27T01:38:17","guid":{"rendered":"https:\/\/dev.www.purdue.edu\/engineering\/I2SAFE-Lab\/?page_id=453"},"modified":"2026-07-20T19:14:27","modified_gmt":"2026-07-20T23:14:27","slug":"flagging-technologies-assessment","status":"publish","type":"page","link":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/flagging-technologies-assessment\/","title":{"rendered":"Flagging Technologies Assessment"},"content":{"rendered":"\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-bf881693 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/smart-safety-human-factors\/\">Back to Smart Safety<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Project Overview<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"501\" src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-1024x501.png\" alt=\"\" class=\"wp-image-694\" srcset=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-1024x501.png 1024w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-300x147.png 300w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-768x376.png 768w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-1536x751.png 1536w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/07\/Work-zone_layout-2048x1002.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/06\/Project-Video_with-music-1.mp4\"><\/video><\/figure>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Rationale<\/strong><\/h3>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\">Work-zone flagging operations are critical for driver safety, but traditional human flagging can be inconsistent, difficult to notice, and risky for workers. This project evaluates multiple automated and enhanced flagging technologies using driving simulation, eye-tracking, physiological sensing, surveys, and field feedback to identify systems that improve driver attention, response, and safe stopping behavior.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Impact<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduce worker exposure to traffic hazards&nbsp;by supporting alternatives to traditional human flaggers in high-risk work-zone environments.<\/li>\n\n\n\n<li style=\"margin-top:var(--wp--preset--spacing--10);margin-bottom:var(--wp--preset--spacing--10)\">Improve work-zone safety&nbsp;by identifying flagging technologies that help drivers detect stop conditions earlier and respond more safely.<\/li>\n\n\n\n<li>Support technology selection and deployment&nbsp;through a decision-making matrix that considers driver behavior, worker\/operator feedback, and practical field implementation.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Publication List<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span style=\"text-decoration: underline\"><strong>Conference Proceedings<\/strong><\/span><\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Zhou, W., Zang, J., Liu, C.L., et al. (2026) &#8220;Evaluating the Impact of Warning Signals on Drivers&#8217; Attention and Reaction: A Driving Simulation of Flagging Technology&#8221;. <em>Construction Research Congress 2026<\/em>. San Antonio, Texas.<\/li>\n<\/ol>\n\n\n\n<div style=\"height:0px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Researcher<\/strong><\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3a88641f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-683x1024.jpg\" alt=\"\" class=\"wp-image-164\" style=\"aspect-ratio:0.6670071501532175;width:73px;height:auto\" srcset=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-683x1024.jpg 683w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-200x300.jpg 200w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-768x1152.jpg 768w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-1024x1536.jpg 1024w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-1365x2048.jpg 1365w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chia-Ling-Liu.1-scaled.jpg 1707w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-683x1024.jpg\" alt=\"\" class=\"wp-image-160\" style=\"aspect-ratio:0.6669712934093108;width:74px;height:auto\" srcset=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-683x1024.jpg 683w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-200x300.jpg 200w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-768x1152.jpg 768w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-1024x1536.jpg 1024w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-1365x2048.jpg 1365w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Zhou-Wei_25-scaled.jpg 1707w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-683x1024.jpg\" alt=\"\" class=\"wp-image-202\" style=\"aspect-ratio:0.6670071501532175;width:74px;height:auto\" srcset=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-683x1024.jpg 683w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-200x300.jpg 200w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-768x1152.jpg 768w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-1024x1536.jpg 1024w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-1365x2048.jpg 1365w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2025\/11\/Chang-Woei-Chyi-1-scaled.jpg 1707w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3a88641f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center wp-block-paragraph\">Chia-Ling (Gillian) Liu<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center wp-block-paragraph\">Wei Zhou<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center wp-block-paragraph\">Woei-Chyi Chang<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span style=\"text-decoration: underline\"><strong>Collaborators<\/strong><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li style=\"margin-top:var(--wp--preset--spacing--10);margin-bottom:var(--wp--preset--spacing--10)\">Brandon Pitts, PhD, Edwardson School of Industrial Engineering, Purdue University<\/li>\n\n\n\n<li style=\"margin-top:var(--wp--preset--spacing--10);margin-bottom:var(--wp--preset--spacing--10)\">Behzad Esmaeili, PhD, Lyles School of Civil and Construction Engineering, Purdue University<\/li>\n<\/ul>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Funding Source<\/strong><\/h3>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3a88641f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT-1024x1024.png\" alt=\"\" class=\"wp-image-468\" style=\"aspect-ratio:0.995107475136349;width:79px;height:auto\" srcset=\"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT-1024x1024.png 1024w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT-300x300.png 300w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT-150x150.png 150w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT-768x768.png 768w, https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-content\/uploads\/2026\/05\/INDOT.png 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3a88641f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Project Overview Rationale Work-zone flagging operations are critical for driver safety, but traditional human flagging can be inconsistent, difficult to notice, and risky for workers. This project evaluates multiple automated and enhanced flagging technologies using driving simulation, eye-tracking, physiological sensing, surveys, and field feedback to identify systems that improve driver attention, response, and safe stopping [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-453","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/pages\/453","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/comments?post=453"}],"version-history":[{"count":8,"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/pages\/453\/revisions"}],"predecessor-version":[{"id":814,"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/pages\/453\/revisions\/814"}],"wp:attachment":[{"href":"https:\/\/www.purdue.edu\/engineering\/I2SAFE-Lab\/wp-json\/wp\/v2\/media?parent=453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}