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Comparing the as-planned schedule with as-built conditions allows stakeholders to determine how project execution deviates from the baseline. Periodic monitoring supports early detection of discrepancies and rapid corrective actions to reduce schedule impacts. This report proposes a technology-supplemented monitoring approach using mobile lidar and 4D Design Models to compute and compare Percentage of Completion for bridge elements from planned versus recorded scans.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/project-progress-tracking-using-lidar-and-4d-design-models-final-report/650776/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/project-progress-tracking-using-lidar-and-4d-design-models-final-report/650776.png","ImageObject",300,407,{"name":92,"@type":93},"The UK Girl","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What problem does the report address in construction progress tracking?","Question",{"text":112,"@type":113},"The report addresses the delay and difficulty of obtaining timely, detailed as-built information from a construction site, which can prevent stakeholders from reacting quickly to schedule discrepancies.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the proposed approach capture as-built data?",{"text":117,"@type":113},"It uses mobile lidar to accurately record as-built data at high detail from a construction worksite within a reasonable period while ensuring data collector safety.",{"name":119,"@type":110,"acceptedAnswer":120},"How are project performance and discrepancies evaluated?",{"text":121,"@type":113},"The framework uses point cloud data with 4D Design Models to identify deviations from planned work, calculates Percentage of Completion for as-built bridge elements, and compares it with as-planned Percentage of Completion values per element and scan date.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},650776,1792844156,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":16,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},2199028711991,"https://us-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","PROJECT PROGRESS TRACKING USING LIDAR AND 4D DESIGN MODELS  \nFinal Report  \nSPR 811  \nPROJECT PROGRESS TRACKING USING LIDAR AND 4D  \nDESIGN MODELS  \nFinal Report  \nSPR 811  \nby  \nYelda Turkan  \nMichael J. Olsen  \nJohn Gambatese  \nNisha Puri  \nOregon State University  \nKearney Hall, Corvallis, OR 97331  \nfor  \nOregon Department of Transportation  \nResearch Section  \n555 13th Street NE, Suite 1  \nSalem OR 97301  \nand  \nFederal Highway Administration  \n1200 New Jersey Ave. SE  \nWashington, DC 20590-0003  \nTechnical Report Documentation Page  \n\n| 1. Report No.\u003Cbr>FHWA-OR-RD-19-12 |  | 2. Government Accession No. |  |  | 3. Recipient’s Catalog No. |  |\n| --- | --- | --- | --- | --- | --- | --- |\n| 4. Title and Subtitle\u003Cbr>Project Progress Tracking Using Lidar and 4D Design Models |  |  |  |  | 5. Report Date\u003Cbr>June 2019 |  |\n|  |  |  |  |  | 6. Performing Organization Code |  |\n| 7. Author(s)\u003Cbr>Yelda Turkan, Michael J. Olsen, John Gambatese, and Nisha Puri |  |  |  |  | 8. Performing Organization Report No. |  |\n|  | 9. Performing Organization Name and Address\u003Cbr>Oregon Department of Transportation\u003Cbr>Research Section\u003Cbr>555 13th Street NE, Suite 1\u003Cbr>Salem, OR 97301 |  |  |  | 10. Work Unit No. (TRAIS) |  |\n|  |  |  |  |  | 11. Contract or Grant No. SPR 811 |  |\n| 12. Sponsoring Agency Name and Address\u003Cbr>Oregon Dept. of Transportation\u003Cbr>Research Section Federal Highway Admin.\u003Cbr>555 13th Street NE, Suite 1 1200 New Jersey Ave. SE\u003Cbr>Salem, OR 97301 Washington, DC 20590-0003 |  |  |  |  | 13. Type of Report and Period Covered\u003Cbr>Final Report |  |\n|  |  |  |  |  | 14. Sponsoring Agency Code |  |\n| 15. Supplementary Notes |  |  |  |  |  |  |\n| 16. Abstract: Accurate data collected from on-going construction projects assists project field engineers with tracking the progress of construction work. The comparison of as-planned schedules against the as-built status of construction enables the involved parties to determine project performance. Periodic monitoring of project performance enables timely identification of discrepancies between the schedule baseline and project schedule. The rapid identification of discrepancies allows necessary measures to be taken to minimize the impact of a delay on the construction workflow. In transportation projects, the traditional means of acquiring as-built data from a construction site prevents involved parties from receiving the required information from the site in a timely manner. The delay in the communication of information ultimately causes subsequent delays in implementing necessary courses of action targeted toward improving the workflow. Therefore, this project develops a technology-supplemented progress monitoring approach. The technology accurately records as-built data with a high level of detail from a construction worksite within a reasonable period of time using lidar while ensuring the safety of the data collector. The proposed framework utilizes point cloud data obtained using mobile lidar technology and 4D Design Models to identify deviations ofthe performed work from the planned work. Percentage of Completion (POC) for the as-built bridge elements are calculated and compared with the as-planned POC. The differences between these two POC values for an element, on a particular scan date, are used for assessing the performance of the proposed framework. |  |  |  |  |  |  |\n| 17. Key Words\u003Cbr>Construction progress tracking, mobile lidar, 4D Design Models, Object Recognition System |  |  | 18. Distribution Statement\u003Cbr>Copies available from NTIS, and online at\u003Cbr>[www.oregon.gov/ODOT/Programs/Pages/Re](www.oregon.gov/ODOT/Programs/Pages/Re)[search-Publications.aspx](search-Publications.aspx) |  |  |  |\n| 19. Security Classification (of this report): Unclassified |  | 20. Security Classification (of this page): Unclassified |  | 21. No. of Pages 80 |  | 22. Price |\n\nTechnical Report Form DOT F 1700.7 (8-72) Reproduction of completed page authorized Printed on recycled paper  \niii  \n\n","cbCairGrdvgY3Eh0","https://ap.wps.com/l/cbCairGrdvgY3Eh0","pdf",5074153,"English","# Abstract\n# Key Words\n# Report Details","[{\"question\":\"What problem does the report address in construction progress tracking?\",\"answer\":\"The report addresses the delay and difficulty of obtaining timely, detailed as-built information from a construction site, which can prevent stakeholders from reacting quickly to schedule discrepancies.\"},{\"question\":\"How does the proposed approach capture as-built data?\",\"answer\":\"It uses mobile lidar to accurately record as-built data at high detail from a construction worksite within a reasonable period while ensuring data collector safety.\"},{\"question\":\"How are project performance and discrepancies evaluated?\",\"answer\":\"The framework uses point cloud data with 4D Design Models to identify deviations from planned work, calculates Percentage of Completion for as-built bridge elements, and compares it with as-planned Percentage of Completion values per element and scan date.\"}]","Project Progress Tracking Using Lidar and 4D Design Models - Final Report | PDF",202]