Yi-Chang James Tsai

Brief Biography: 

Before joining the faculty at Georgia Tech, Dr. Tsai worked as a senior research scientist in the GIS center at Georgia Tech for 10 years. Since 1997, he has led a research team and worked with GDOT pavement engineers, developing and successfully implementing a large-scale Oracle GIS-based pavement preservation and management system for GDOT to effectively preserve and manage its 18,000-centerline miles of highway for the past 20 years. A series of models and programs developed by Dr. Tsai, including field pavement condition data acquisition, the annual pavement preservation project prioritization and program development, treatment determination model, cost model, and performance forecasting model, and long-term system performance simulation and optimization, have been successfully implemented by the Office of Maintenance of the GDOT. They have resulted very positive impact on GDOT's operations.

He has received the innovation award on GIS-enabled Ship Recognition - Innovation Research Grants for Transportation Security in 2007. He was named Chinese Chang Jiang Scholar in 2009 for his international recognition on pavement preservation and management using sensing and information technologies. The Chang Jiang Scholar is one of the most prestigious scholar honors in China.

His research focuses on 1) “Smart Cities: Intelligent Transportation Asset Health and Safety Assessment, Monitoring, and Managing Using Emerging Sensing Technologies and Artificial Intelligence (AI)”, 2) “New Transportation Ecosystem with Telematics, Connected and Connected Vehicles”, 3) Big Data Analytics. The sensing technologies include 2D imaging, 3D laser, Lidar, UAV, Inertial Measurement Unit (IMU), Smart Phones, and GPS/GIS Technologies. His research includes spatial optimization of sensor and information technology and development of intelligent decision-support systems for improving roadway asset management with a special focus on pavements, roadside assets, like signs and guardrails, roadway safety, and logistics. He has actively developed ITS applications. Dr. Tsai had also led more than $3.5M of competitively selected research projects on “Remote Sensing and GIS-enabled Asset Management (RS-GAMS)” and “RS-GAMS Phase 2”, sponsored by the USDOT Office of the Assistant Secretary for Research and Technology (USDOT/OST-R), from 2010 to 2014. These projects were designed to intelligently assess roadway asset health conditions by using emerging sensor technologies installed in the intelligent Georgia Tech Sensing Vehicle (GTSV), along with artificial intelligence and machine learning that Dr. Tsai and his research team has integrated and developed (http://www.news.gatech.edu/2013/09/05/road-warriors-gt-researchers-redefine-infrastructure-maintenance). Dr. Tsai’s GDOT research project of “Implementation of Automatic Sign Inventory and Pavement Condition Evaluation on Georgia’s Interstate Highway” has been competitively selected as the 2017 AASHTO High Value Research (HVR) Award because of its innovation and broad impact (https://ce.gatech.edu/news/national-group-honors-research-using-lasers-a...).

He is also the PIs for three research projects competitively selected and sponsored by the National Academy of Science (NAS) NCHRP Innovation Deserving Exploratory Analysis (IDEA) program on “Using Image Pattern Recognition Algorithms for Processing Video Log Images to Enhance Roadway Infrastructure Data Collection”, on “Development of Sensing Methodology for Intelligent and Reliable Work Zone Hazard Awareness”, and “Development of an Asphalt Pavement Raveling Detection Algorithm Using Emerging 3D Laser Technology and Macrotexture Analysis”. His research outcomes were featured in the National Academy of Sciences’ Ignition Magazine (http://www.trb.org/Publications/Blurbs/163652.aspx) because of their significant positive impact on asset management and roadway safety. One of the most noteworthy accomplishment is his development of a methodology to automatically detect sign condition changes using roadway images that are widely available. Although the developed methodology is applied for routine traffic sign asset inventory, it has promising applications for expedited infrastructure condition evaluation along with unmanned aerial vehicle (UAV) and smart phones, following natural disasters because of its automatic and non-contact nature.

He is also the PI of License Plate Recognition, sponsored by the State Road and Tollway Authority (STRA), and the PIs for several research projects sponsored by GDOT, including Using Image Processing for Pavement Crack Growth Measurement-A Feasibility Study, and Development of Optimization Modules for GDOT Pavement Management System. He is also developing vehicle detection and tracking technologies for intelligent transportation system (ITS) and real-time traffic flow monitoring to improve road safety and mobility. He also works on logistics routing and scheduling for the United Parcel Service (UPS) and maximizing Port and Transportation System and logistics Productivity by Exploring Alternative Port Operation Strategies. Dr. Tsai is also working on a large-scale project on “Crowdsourcing Transportation Asset Management Using Low-Cost Mobile Devices” to create a synergy between logistics companies and transportation agencies. Dr. Tsai was also invited to give a talk on "Dynamic Mapping of Infrastructure & Road Conditions" in the Connected Fleets USA 2017 in September 26, 2017. He is currently part of the technical committee of the United States National Cooperative Highway Research Program (NCHRP 20-102 (06) Road Markings for Machine Vision, one of 14 connected and automated vehicle research projects sponsored by the USDOT. Dr. Tsai served on the Expert Task Group (ETG) of the US National Strategic Highway Research Program II (SHRP II) for the Naturalistic Driving Study (NDS) to provide guidance on research focuses, including the use of computer vision or processing and analyzing big NDS data, from 2008 to 2015. He is also on the technical committee of the AFD 10 Pavement Management Systems of the Transportation Research Board in the National Academies. Since 2010, he has served as the Associate Editor of ASCE Journal of Computing in Civil Engineering.

Dr. Tsai holds a professional engineering (PE) license.

Last Name: 
Tsai
Office Building: 
SEB
Reports: 
Tsai, Y. and Wang, Z. (2013) “Remote Sensing and GIS-enabled Asset Management System (RS-GAMS)”, Final Report, USDOT RITA Program.
Tsai, Y. (2011) “Development of a Sensing Methodology for Intelligent and Reliable Work-Zone Hazard Awareness”, National Academy of Science NCHRP IDEA-139 Final Report.
Tsai, Y. (2009) “Using Image Pattern Recognition Algorithms for Processing Video Log Images to Enhance Roadway Infrastructure Data Collection”, National Academy of Science NCHRP IDEA-121 Final Report.
Tsai, Y., Ai*, C., Hu, Z. (2009) “Exploring Methods for GDOT’s Comprehensive Maintenance Quality Control – Feasibility Study”, Final Report, Georgia Department of Transportation.
Tsai, Y. and Wang, Z. (2009) “Using Image Processing for Pavement Crack Growth Measurement– A Feasibility Study”, Final Report, Georgia Department of Transportation.
Tsai, Y (2005) “Development of Optimization Modules for GDOT Pavement Management System”, Final Report, Georgia Department of Transportation.
Office #: 
328
Affinity Group / Department: 
Construction and Infrastructure Systems Engineering
Transportation Systems Engineering
Type: 
Faculty
Academic Faculty
Education: 
Ph.D. Civil and Environmental Engineering, Georgia Institute of Technology, 1996
M.S.,Civil & Environmental Engineering, Georgia Institute of Technology, 1994
M.S., Civil Engineering, National Chung-Hsing University, 1989
B.S., Civil Engineering, National Chung-Hsing University, 1987
First Name: 
Yi-Chang
Patents: 
“GTRC6321PCT - Systems And Methods For Identifying Traffic Control Devices And Testing The Retroreflectivity Of The Same (granted in 2016)
Photo: 
Publications (Proceedings): 
Tsai, Y., Wang, Z., Jiang, C., Mahfood, B., and Rone, J. (2015) “Innovative Crack Sealing Analysis and Cost Estimation for Airport Runway Shoulders Using 3D Laser Technology and Automatic Crack Detection Algorithms”, the Airfield and Highway Pavements 2015: Innovative and Cost-effective Pavements for a Sustainable Future, Miami, FL, June 7 – 10, pp. 652-661.
Tsai, Y., Wu, Y., Doan, J. (2015) “A Critical Assessment of Jointed Plain Concrete Pavement (JPCP) Using Sensing Technology – A Case Study on I-285”, the 9th International Conference on Managing Pavements (ICMPA9), Alexadria Virginia, May 18-22, 2015.
Tsai, Y., Wu, Y., Brantley T., Robinson-Perry E., Bui, B. (2015) “Integrating Risk into GDOT Pavement Preservation Planning”, the 9th International Conference on Managing Pavements (ICMPA9), Alexadria Virginia, May 18-22, 2015.
Chenglong Jiang and Yichang (James) Tsai, “Implementation of Automatic Crack Evaluation Using Crack Fundamental Element”, IEEE International Conference on Image Processing, 2014.
Tsai, Y., Li*, F., Wu, Y. “Rutting Condition Assessment Using Emerging 3D Line-Laser Imaging and GPS/GIS Technologies”, the International Conference on Road and Airfield Pavement Technology, Taipei, Taiwan, July 14, 2013.
Tsai, Y., Cui*, B. X., Xu*, Y (2013) “Quantifying Overall Performance of Highway Design, Construction and M&R Practices Using ECC & ASL”, the International Conference on Road and Airfield Pavement Technology, Taipei, Taiwan, July 14, 2013.
Huang* Y., Tsai, Y. (2012) “Crack Fundamental Element (CFE) for Multi-scale Crack Classification”, 7th RILEM International Conference on Cracking in Pavements, Delft, Netherlands, June 20, 2012.
Tsai, Y., Jiang* C. (2012) “Crack Detection Using High-resolution 3D Line Laser Imaging Technology”, 7th RILEM International Conference on Cracking in Pavements, Delft, Netherlands, June 20, 2012.
Tsai, Y., Wang*, C., Wu, Y. (2011) “A Vision-based Approach to Study Driver Behavior in Work zone Areas” Proceedings of the 3rd International Conference on Road Safety and Simulation, Indianapolis, U.S., September 14-16, 2011.
Hui*, B., Zhang C., Tsai, Y. (2011) “Orthogonal Test and Anti-aging Properties Analysis of Water Stability of Anti-rutting Agent Modified Asphalt Mixture”. The 11th International Conference of Chinese Transportation Professionals, Nanjin, China, August 14-17.
Wang*. W., Tsai, Y., Zhi, X., Zhang, C. (2011) “Idea Point Method for Multi-Objective Optimization Model of Pavement Maintenance Treatment”. The 11th International Conference of Chinese Transportation Professionals, Nanjin, China, August 14-17.
Tsai, Y., Li, F.., Kaul*, V., Wang, Z. (2010) “Characterizing Pavement Rut Measurement Errors with Point-based Lasers Using Emerging 3D Continuous Profile-based Laser Technology” NDE/NDT for Highways and Bridges: Structural Materials Technology (SMT) Conference, New York, U.S., August 16-20, 2010.
Kaul*, V., Tsai, Y., Yezzi, A. (2010) "Detection of Curves with Unknown Endpoints using Minimal Path Techniques" Proceeding of British Machine Vision Conference (BMVC) 2010, Aberystwyth, UK (8.9% acceptance rate).
Tsai, Y., Ai*, C., Wu, Y., and Siplon, P. (2010) “Simulating Port Logistics Operations Using 3D Visualization Technology”, Proceedings of the International Conference on Computing in Civil and Building Engineering (ICCCBE), Nottingham, UK, June 30 – July 2, 2010.
Tsai, Y. (2010) “Developing an Intelligent Sign Inventory Using Image Processing”, Proceedings of the International Conference on Computing in Civil and Building Engineering (ICCCBE), Nottingham, UK, UK, June 30 – July 2, 2010.
Tsai, Y. and Umare*, K. (2010) “A Parallelized Image Polygon Detection Algorithm for Road sign Inventory “, Proceedings of the International Conference on Computing in Civil and Building Engineering (ICCCBE), Nottingham, UK, UK, June 30 – July 2, 2010.
Wang, Z., Tsai, Y., Pitts, E. (2010) “Pavement Preservation: Pay Now or Pay Big Later”, Proceedings of the 1st International Conf. of Pavement Preservation, Newport Beach, California, April 13-15, 2010.
Tsai, Y., Purcell*, R., Li*, F., Rabun, J.T. (2010) “How Long Will Asphalt Pavement Last?”, Proceedings of the 1st International Conf. of Pavement Preservation, Newport Beach, California, April 13-15, 2010.
Tsai, Y., Wu, Y., Guo, D. (2010) “A Web-based Chuning Highway Pavement Management System”, Proceedings of the 1st International Conf. of Pavement Preservation, Newport Beach, California, April 13-15, 2010.
Tsai, Y., Hu, Z, Siplon, P. (2009) “GIS-enabled Maritime Awareness System (GMAS)” Proceedings of the 2009 IEEE International Conference on Technologies for Homeland Security”, Waltham, MA, USA, May 11-12, 2009.
Tsai, Y. and Wang, Z. (2008) “ Image Processing Algorithms for An Enhanced Roadway Sign Data Collection”, Proceedings of the 7th International Conference on Managing Pavement Assets, Galgary, Canada, June, 2008.
Tsai, Y., Wu, Y., Pitts, E. (2008) “Improving GDOT’s Annual Preventive Maintenance Using A Collaborative Decision Support System”, Proceedings of the 7th 7th International Conference on Managing Pavement Assets, Galgary, Canada, June, 2008.
Tsai, Y., Yang, C., Wang, Z. (2006) “Spatial Clustering for Determining Economical Highway Pavement Let Projects”, GeoCongress 2006 Geotechnical Engineering in the Information Age, Atlanta, GA, February 26 – March 1, 2006.
Gao*, Bo, Wu, Y., Tsai, Y., Lai, J. S. (2006) “Interactive GIS Map-based Decision Support Program on Multi-year Pavement Needs Analysis”, GeoCongress 2006 Geotechnical Engineering in the Information Age, Atlanta, GA, February 26 – March 1, 2006.
Tsai, Y., Wu, J., Wu, Y., and Wang Z. (2005) “Automatic Roadway Geometry Measurement Algorithm Using Video Images”, Image Analysis and Processing, Springer, LNCS 3617, ISSN 0302-9743, pp. 669 – 678.
Tsai, Y., Wu, J., and Wu, Y. (2005) “Geometry-based License Plate Recognition for Low Resolution Images – A Case Study”, Proceedings of the 9th World Multi-Conference on Systemics, Cybernetics, and Informatics, Orlando, Florida, July 10-13, 2005, Vol. VI, pp. 401 – 406.
Tsai Y. (2005) “Roadway Safety Enforcement Using Image Pattern Recognition”, the 5th International Conference of Chinese Transportation Professionals, hosted in Chang’an University, Xi’an, China on June 25-26, 2005.
Tsai, Y., Wu, J., and Wang, Z. (2004) “Enhanced Transportation Infrastructure Data Collection Using Videolog Image Pattern Recognition”, XIII Pan American Conference on Traffic and Transportation Engineering, Albany, NY, September 26-29.
Tsai, Y. and Gratton, B. (2004) “ Successful Implementation of A GIS-based Pavement Management System”, Proceedings of the 8th International Conference on Applications of Advanced Technologies in Transportation, Beijing, China, May 26-28, 2004, pp. 513-518.
Tsai, Y. and Wu M., and Wang, Z. (2004) “Re-engineered Roadway Transportation Data Inventory Using GPS/GIS”, Proceedings of the 8th International Conference on Applications of Advanced Technologies in Transportation, Beijing, China, May 26-28, 2004, pp. 542-547.
Tsai, Y., Gunning* T. G. and Guo* B. (2002), “IT-based Collaborative Highway Pavement Rehabilitation Prioritization for Georgia DOT”, The 3nd International Conference on Decision Making in Urban and Civil Engineering, London, UK, November, 2002.
Tsai, Y., Wang Z. and Yang C. (2002), “A Prototype Real-time GPS/GIS-based Emergency Response System for Locating and Dispatching Moving Patrol Vehicles with the Shortest Path and Beat-based Spatial Search”, Proceedings of the 3rd International Conference on Transportation and Traffic Studies, Guilin, Guangxi, China, July, Vol. 2, pp. 1361-1368.
Tsai, Y., Lai, L. J., Wu*, Y. (2000), “Using GIS for Supporting Network-level Pavement Maintenance Management”, Proceedings of the 2nd International Conference on Decision Making in Urban and Civil Engineering, Lyon, France, Vol. 1, pp. 461-471.
Parsons, R., Frost, J. D., and Tsai, Y. (1998), “GIS ASSESS – A Spatial Analysis Tool for Site Investigation, Planning and Evaluation”, International Conference on Site Characterization, Atlanta, Georgia, Vol. 1, pp. 251-262.
Tsai, Y., Lai, J. L. and Sun, L. (1998), “Developing A Prototype KBS Decision in Identifying the Causes of Asphalt Pavement Distress”, Proceedings of the 1st Conference on New Information Technologies for Decision Making in Civil Engineering, Montreal, Canada, Vol. 1, pp. 515-526.
Job Title: 
Professor
Research Interests: 
Smart Cities: Intelligent Transportation Asset Health and Safety Condition Assessment, Monitoring, and Management Using Emerging Sensing Technologies and AI
Big Data Analytics
Automated roadway health and safety condition assessment using image processing, 3D laser, and AI.
ITS
GPS/GIS
Decision-support systems for pavement/infrastructure/asset management (inventory and condition assessment, preservation, and management)
Roadway safety
Logistics
Publications (Articles): 
Ai*, C., Tsai, Y. (2016) “Automated Traffic Sign Retroreflectivity Condition Assessment Using Computer Vision and Mobile LiDAR”, Transportation Research Part C: Emerging Technologies, Vol. 63, pp. 96-113.
Wang*, C., Wang, Z., Tsai, Y. (2016) “Piecewise Multiple Linear Models for Pavement Marking Retroreflectivity Prediction under Effect of Winter Weather Events” Journal of The Transportation Research Record, National Academy of Sciences; Washington, DC., 2016 (2551): 52-61.
Tsai, Y., Wu, Y., Gadsby*, A., Hanes, S. (2016) “Critical Assessment of the Long-term Performance and Cost-effectiveness of a New Pavement Preservation Method: Micro-Milling and Thin Overlay” Journal of The Transportation Research Record, National Academy of Sciences; Washington, DC., 2016 (2550): 8-14.
Ai, C.* and Tsai, Y. (2016) “An Automated Sidewalk Assessment Method for the Americans with Disabilities Act Compliance Using 3-D Mobile LiDAR.” Journal of Transportation Research Record, National Academy of Sciences, 2016 (2542): 25-32.
Jiang, C.*, Tsai, Y., Wang, Z. (2016) “Crack Deterioration Analysis Using 3D Pavement Surface Data: A Pilot Study on Georgia State Route 26.” Journal of Transportation Research Record, National Academy of Sciences, 2016 (2589): 154-161.
Jiang*, C. and Tsai, Y. (2015) “Enhanced Crack Segmentation Algorithm Using 3D Pavement Data”, ASCE Journal of Computing in Civil Engineering, 2015, 30(3): 04015050.
Tsai, Y., Wang, Z., Li*, F. (2015) “Assessment of Rut Depth Measurement Accuracy of Point-based Rut Bar Systems using Emerging 3D Line Laser Imaging Technology”, Journal of Marine Science and Technology, Vol. 23, No. 3, pp. 322-330 (2015), DOI: 10.6119/JMST-014-0327-1.
Tsai, Y., Wu, Y., Lai, J. S. (2015) “Critical Assessment of Jointed Plain Concrete Pavement Performance Using 40-Years of Condition Evaluation Data”, Journal of Marine Science and Technology, Vol. 23, No. 3, pp. 380-387 (2015), DOI: 10.6119/JMST-014-0416-5.
Tsai, Y. and Wu, Y. (2015) “Sustainable and Cost-Effective Pavement Preservation Method: Micro-Milling and Thin Overlay” Journal of Transportation Engineering, in press
Tsai, Y., Jiang*, C., Huang*, Y. (2014) “A Multi-scale Crack Fundamental Element Model for Real World Pavement Crack Classification”, ASCE Journal of Computing in Civil Engineering, vol. 28, no. 4, 2014.
Tsai, Y., Wu, Y., and Lewis*, Z. (2014). ”Full-Lane Coverage Micromilling Pavement-Surface Quality Control Using Emerging 3D Line Laser Imaging Technology.” Journal of Transportation Engineering. Volume 140 Issue 2.
Ai*, C. and Tsai, Y. (2014) “Critical Assessment of an Enhanced Traffic Sign Detection Method Using Mobile LiDAR and INS Technologies.” Journal of Transportation Engineering (10.1061/(ASCE)TE.1943-5436.0000760).
Ai*, C. and Tsai, Y. (2014) “Automatic Horizontal Curve Identification and Measurement Method Using GPS Data.” Journal of Transportation Engineering (10.1061/(ASCE)TE.1943-5436.0000740).
Ai*, C. and Tsai, Y. (2014) “Geometry Preserving Active Polygon (GPAP)-Incorporated Sign Detection Algorithm” Journal of Computing in Civil Engineering (10.1061/(ASCE)CP.1943-5487.0000422).
Tsai, Y., Lai, J., Wu, Y. (2014) “Application of Micro-milling for Asphalt Pavement Rehabilitation.” Highway, July 2014 No. 7. China.
Tsai, Y., Li*, F., Wu, Y. (2013) “A New Rutting Measurement Method Using Emerging 3D Line-Laser Imaging System”, Int. Journal of Pavement Research and Technology, Vol. 6(5):667-672.
Wang*, W., Tsai, Y. (2013) “Back-Propagation Network Modeling Using LTPP Data”, Int. Journal of Pavement Research and Technology, Vol. 6(5):651-657.
Tsai, Y., Kaul*, V., Yezzi, A (2013) “Automating the Crack Map Detection Process for Machine Operated Crack Sealer”, Automation in Construction, Vol. 31, 10-18.
Wang, Z., Tsai Y. (2013) “Pavement Layer Data Repository Using A Spatio-Temporal Block Model”, ASCE Journal of Computing in Civil Engineering, 27(1), 18–26.
Tsai, Y., Huang* Y. (2012) “A Generalized Framework for Parallelizing Traffic Sign Detection of Video Log Images Using Multi-Core Processors”, Computer-Aided Civil and Infrastructure Engineering, 27(7), 476-493.
Tsai, Y., Wu, Y., Ai*, C., Pitts, E. (2012) “Feasibility Study of Measuring Concrete Joint Faulting Using 3D Continuous Pavement Profile Data,” ASCE Journal of Transportation Engineering, 138(11), 1291-1296.
Xu*, Y., Tsai Y. (2012) “Financial Consequences of the Delayed Pavement Rehabilitation Using LTPP Data – A Case Study”, ASCE Journal of Transportation Engineering, 138(8), 975–982.
Lettsome* C., Tsai, Y., Kaul*, V. (2012) “Enhanced Adaptive Filter Bank-Based Automated Pavement Crack Detection”, the Journal of Electronic Imaging, 21(4), 043008 (October 15, 2012); doi: 10.1117/1.JEI.21.4.043008.
Tsai, Y., Dusanter*, T., Wu, Y., Ai*, C. (2012) “Automatic Truck Processing Time Extraction at Maritime Terminal Gate Using Low Frame-Rate Images”, Journal of Intelligent Transportation Systems, 16(4):211-225, 2012.
Zhi, X., Wang*, W., Tsai, Y. (2012) “Cost-benefit Timing for Applying Slurry Seal on Actual Roadway Tests in China”, Journal of Center South of University of Technology, Vol. 19, issue 8, pp. 2394-2402.
Tsai, Y., Li*, F. (2012) “Detecting Asphalt Pavement Cracks under Different Lighting and Low Intensity Contrast Conditions Using Emerging 3D Laser Technology”, ASCE Journal of Transportation Engineering, 138(5), 649–656.
Tsai, Y., Wu, Y., Lai, J., Geary, G. (2012) Characterizing Micro-milled Pavement Textures Using RVD for Super-thin Resurfacing on I-95 Using A Road Profiler, Journal of The Transportation Research Record, No.2306, pp.144-150.
Kaul*, V., Yezzi, A., Tsai, Y. (2012) “Detecting Curves with Unknown Endpoints and Arbitrary Topology Using Minimal Paths”, IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 34, No. 10, pp. 1952-1965.
Huang*, Y. and Tsai, Y. (2012), “Non-parametric Lens Debris Detection of Video Log Images Using Hysteresis updating” ASCE Journal of Computing in Civil Engineering, Vol. 26(2), pp.161-171.
Tsai, Y., Feng*, L., Purcell*, R., and Rabun J. (2012) “A Reliable Statewide Pavement Performance Study Using a Confidence Evaluation System”, ASCE Journal of Transportation Engineering, Vol. 138(3), pp. 339-347.
Ai*, C. and Tsai, Y. (2012), “A Hybrid, Active Contour Incorporated Sign Detection Algorithm”, ASCE Journal of Computing in Civil Engineering, Vol. 26(1):28-36.
Huang*, Y., Tsai, Y (2011) “Enhanced pavement distress segmentation algorithm using dynamic programming and connected component analysis”, Journal of The Transportation Research Record, No.2973, pp.89-98. National Academy of Sciences; Washington, DC.
Tsai, Y., Yang*, Q., Wu, Y. (2011) Identifying and Quantifying Intersection Obstruction and Its Severity Using LiDAR Technology and GIS Spatial Analysis, Journal of The Transportation Research Record, 2011, No. 2241, pp 99-108.
Hu, Z. and Tsai, Y. (2011) “Image Recognition Model for Developing a Sign Inventory” ASCE Journal of Computing in Civil Engineering, Vol. 25(2): 149-158.
Lettsome*, C., Tsai, Y. (2011) “An Automated Filter Bank-Based Pavement Distress Detection System Incorporating Standard Compression Coders”, Int. Journal of Pavement Research and Technology, No. 3907, pp. 1-25.
Tsai, Y., Wu, Y., Guo, D. (2011) “Enhanced Pavement Preservation Using A Lane-based, Image-Tracking, GIS-enabled, and Life-cycle Activity Integrated Chuning PMS”, Int. Journal of Pavement Research and Technology, Vol. 4(1):11-20.
Wang, I., Tsai, Y., and Feng*, L. (2011) “A Network Flow Model for Clustering Segments and Minimizing Total Maintenance and Rehabilitation Cost” Computers & Industrial Engineering 60 (2011) 593-601.
Tsai, Y., Huang*, Y. (2010) “Automatic Detection of Deficient Video Log Images Using a Histogram Equity Index and an Adaptive GMM” Computer-Aided Civil and Infrastructure Engineering, Vol. 25 (2010):479-493.
Kaul*, V, Tsai, Y., Mersereau, R. M. (2010) “A Quantitative Performance Evaluation of Pavement Distress Segmentation Algorithms”, Journal of The Transportation Research Record, Journal of The Transportation Research Record, No. 2153, pp. 106-113, National Academy of Sciences; Washington, DC.
Tsai, Y., Hu, Z., Alberti*, C. (2010) “Roadway Sign Change Detection Algorithm Using Multi-Scale Sign Image Matching (M-SIM)”, Photogrammetric Engineering and Remote Sensing (PE&RS) Journal, Vol. 76(4):391-405.
Tsai, Y., Kaul*, V., Mersereau, R. M. (2010) “A Critical Assessment of Pavement Distress Segmentation Methods Performance Evaluation of Pavement Distress Segmentation Methods” ASCE Journal of Transportation Engineering, Vol. 136 (1):11-19.
Tsai, Y., Hu, Z., Wang, Z. (2010) “Vision-based Roadway Geometry Computation” ASCE Journal of Transportation Engineering, Vol. 136(3):223-233.
Tsai, Y., Wu, J., Wang, Z., Hu, Z. (2010) “Horizontal Roadway Curvature Computation Algorithm Using Vision Technology”, Computer-Aided Civil and Infrastructure Engineering, Vol. 25 (2010):78–88.
Tsai, Y., Kim*, P., Wang, Z. (2009) “A Generalized Image Detection Model for Developing a Sign Inventory”, ASCE Journal of Computing in Civil Engineering, Vol. 23(5):266 – 276.
Yang, C., Tsai, Y., Wang Z. (2009) “Algorithm for Spatial Clustering of Pavement Segments”, Journal of Computer-Aided Civil and Infrastructure Engineering, Vol. 24 (2):93-108.
Hu, Z., Tsai, Y. (2009) “A Vision-Based Homography Algorithm for Traffic Sign Attribute Computation”, Journal of Computer-Aided Civil and Infrastructure Engineering, Vol. 24 (6):385–400.
Wang, Z., Tsai, Y., Pitts, E. (2009) “Impact of Escalating Construction Cost on Long-term Pavement Performance Loss”, Journal of The Transportation Research Record, No. 2093, pp. 84-92, National Academy of Sciences; Washington, DC.
Tsai, Y., Chung, Y., Shen*, C., Cressman, N (2009) “A Poisson-Based Wavelet Shrinkage Site Selection (WASSS) Method”, Journal of The Transportation Research Record, No. 2136, pp. 20-27, National Academy of Sciences; Washington, DC.
Wu J. and Tsai, Y. (2006) “Enhanced Roadway Geometry Data Collection Using An Effective Video Log Image Processing Algorithm”, Journal of The Transportation Research Record, No. 1972, pp. 133-140, National Academy of Sciences; Washington, DC.
Wu, J. and Tsai, Y. (2006), “Enhanced Roadway Inventory Using 2-D Sign Video Image recognition Algorithm”, Journal of Computer-Aided Civil and Infrastructure Engineering, Vol. 21, pp. 369-382.
Wu, J. and Tsai, Y. (2005), “Real-time Speed Limit Sign Recognition Based on Locally Adaptive Thresholding and Depth-First-Search”, Special Issue on Mobile Mapping Technologies, Photogrammetric Engineering and Remote Sensing (PE&RS) Journal. Vol. 71(4):405 – 414, April 2005.
Tsai, Y. and Yang, E. (2004), “A Constrained Fuzzy c-Mean Clustering Algorithm for Determining Bridge Let Projects”, ASCE Journal of Computing in Civil Engineering, Vol. 18(3):215-225.
Tsai, Y. and Gao*, B., Lai, J. (2004), “GIS-Enabled Multi-Year Project-Linked Network Pavement MR&R System”, Journal of The Transportation Research Record, No. 1889, pp. 21-30, National Academy of Sciences; Washington, DC.
Tsai, Y. and Wu, J. (2002), “Shape and Texture-based 1-D Image Processing Algorithm for Real-time Stop Sign Road Inventory Data Collection”, Journal of Intelligent Transportation System, Vol. 7, pp. 213-234.
Tsai, Y. and Lai, J. S. (2002), “A Framework and Strategy for Implementing An IT-based Pavement Management System”, Journal of The Transportation Research Record, No. 1816, pp. 56-64, National Academy of Sciences; Washington, DC.
Tsai, Y. and Lai, J. S. (2001), “Utilization of Information Technology to Enhance Asphalt Pavement Condition Evaluation Program”, The International Journal of Pavement Engineering, Vol. 2(1):17-32.
Tsai, Y. and Frost, J. D. (1999), “Using GIS and KBS Technology for Real-Time Planning of Site Characterization Activities”, Canadian Geotechnical Journal Vol. 36(2):300-312.
Presentations: 
Tsai, Y. (2012) “Intelligent Pavement/Infrastructure Condition Evaluation, Preservation, and Management Using Information and Sensing Technologies”, invited by Southwest Jiaotong University to give a presentation, Chengdu, China, December 24, 2012.
Tsai, Y. (2012) “Development and Application of Information Technology to Transportation Infrastructure”, invited by Chongqing Jiaotong University to give a presentation, Chongqing, China, December 19, 2012.
Tsai, Y. (2012) “A Sensor-based and Spatial Enabled Pavement Management System” Structural Materials Technology (SMT) 2012 Conference: NDT/NDE for Highways and Bridges. Remote Sensing Workshop on Friday August 24, 2012.
Tsai, Y. (2012) "Information and Sensing Applications to Pavement/Asset Management" invited by Cambridge University to give a presentation, June 18, 2012.
Tsai, Y. (2012) Remote Sensing and GIS-Enabled Roadway Asset Management, 2012 Annual TRB conference, Washington D.C.
Tsai, Y., Jiang*, C., Wang, Z. (2012) Innovative Method for Cracking-Severity-Level Classification Using Three-Dimensional Continuous Transverse Laser Profiles, 2012 Annual TRB conference, Washington D.C.
Ai*, C., Tsai, Y. (2012) Critical Assessment of Automatic Traffic Sign Detection Using Three-Dimensional LiDAR Point Cloud Data, 2012 Annual TRB conference, Washington D.C.
Tsai, Y., Wu, Y., Wang*, C., Pitts, E., Cressman, N (2012) Integrating Safety into Resurfacing Project Reprioritization for Minimizing Pavement-Deficiency-Induced Safety Risks, 2012 Annual TRB conference, Washington D.C.
Tsai, Y. (2012) Developing Sensing Methodology for Intelligent and Reliable Work Zone Hazard Awareness, 2012 Annual TRB conference, Washington D.C.
Tsai, Y., Li*, F., Wang, Z. (2012) Automated Detection of Isolated Ruts on I-95 Using 3D Continuous Transverse Profiles, 2012 Annual TRB conference, Washington D.C.
Tsai, Y., Wu, Y., Lai, J. S., Geary, G. (2012) Characterizing Micromilled Pavement Textures Using Range-to-Valley-Depth for Super-thin Resurfacing on I-95 with Road Profiler, 2012 Annual TRB conference, Washington D.C.
Tsai, Y. (2011) "Sensor-based and Spatial-enabled Pavement/Asset Management" invited by University of Waterloo to give a presentation, October 17, 2011.
Tsai, Y. (2011) "Development of Innovative Information and Sensor Technology for Pavement/Roadway Asset Management," invited by Carnegie Mellon University to give a presentation, April 8, 2011.
Tsai, Y., Li*, F. (2011) Feasibility Study of Detecting Cracks under Poor Lighting and Intensity Contrast Conditions Using Emerging 3D Laser Technology, 2011Annual TRB conference, Washington, D.C.
Tsai, Y., Kaul*, V., Yezzi, A. (2011) Automating the Crack Map Detection Process for Machine Operated Crack Sealer, 2011Annual TRB conference, Washington, D.C.
Wang, Z., Tsai, Y., Pitts, E. (2011) Study of Budget Shortfall Impact on Long-term Pavement Preservation, 2011Annual TRB conference, Washington, D.C.
Huang* Y., Tsai, Y. (2011) Enhanced Pavement Distress Segmentation Algorithm using Dynamic Programming and Connected Component Analysis, 2011Annual TRB conference, Washington, D.C.
Tsai, Y., Wu, Y., Ai*, C. (2011) Critical Assessment of Measuring Concrete Joint Faulting Using 3D Continuous Pavement Profile Data, 2011Annual TRB conference, Washington, D.C.
Tsai, Y., Yang*, Q., Wu, Y., Ai*, C. (2011) Identifying and Quantifying Intersection Obstruction and Its Severity Using LiDAR Technology and GIS Spatial Analysis, 2011Annual TRB conference, Washington, D.C.
Tsai, Y., Wang, Z., Li*, F. (2011) Assessment of Rut Depth Measurement Using Emerging 3D Continuous Laser Profiling Technology, 2011Annual TRB conference, Washington, D.C.
Tsai, Y. (2010) "Intelligent Transportation System (ITS) Application to Pavement/Roadway Asset Management" invited by Tsinghua University to give a presentation, December 14, 2010.
Tsai, Y. (2010) "Intelligent Transportation System (ITS) Application to Pavement/Roadway Asset Management,” invited by National Taiwan University to give a presentation, December 6, 2010.
Tsai, Y. (2010) "Intelligent Transportation System (ITS) Application to Pavement/Roadway Asset Management" invited by Indian Institute of Technology (IIT) Madras to give a presentation, Chennai, India, August 23, 2010.
Tsai, Y. (2010) "Intelligent Transportation System (ITS) Research at Georgia Institute of Technology" invited by Tongji University to give a presentation, August 26, 2010.
Tsai, Y., Wang, Z., Pitts, E. (2010) “Evaluation of Funding Balance Policy Impact on Long-term Pavement Performance Using A Multi-year Network-level Long-term M&R Programming Model”, Annual TRB conference, Washington, D.C., January 11-14, 2010.
Tsai, Y., Purcell*, R., Li*, F., Rabun, J.T. (2010) “Systematic Quantification and Analysis of Roadway Preservation Performance: Using 22 Years of Data” Annual TRB conference, Washington, D.C., January 11-14, 2010.
Kaul*, V., Tsai, Y., Mersereau, R. M. (2010) “A Quantitative Performance Evaluation of Pavement Distress Segmentation Algorithms” Annual TRB conference, Washington, D.C., January 11-14, 2010.
Ai*, C and Tsai, Y. (2009) “Partial Differential Equation (PDE) Incorporated Multi-Feature Traffic Sign Detection”, The Fifth Annual Interuniversity Symposium on Infrastructure Management (AISIM), Iowa City, Iowa, June 19-20, 2009 (selected as the best papers in the symposium to be presented in 2010 TRB conference)
Tsai, Y., Kaul*, V., Mersereau, R. M. (2009) “Comparative Study of Pavement Distress Segmentation Methods”, Annual TRB conference, Washington, D.C., January 11-14, 2010.
Tsai, Y. (2006) “IT-based Asset Management”, invited by Chinese Department of Communication, Beijing, China, November 1, 2006.
Tsai, Y. (2006) “Lessons Learned: How to Successfully Implement GAMS”, 2006 SASHTO, August 4 – 9, 2006, Atlanta, GA.
Tsai Y., Wu, Y., and Pitts E. (2006) “Implementing an Enhanced GDOT Pavement Preservation Program”, 2006 Annual TRB conference.
Wang, Z., Tsai, Y., Rabun, J. T. (2006) “An Integrated Pavement Structure Profile Information System”, 2006 Annual TRB conference.
Tsai, Y. (2006) ‘Update on GIS and PMS’ in the Southeastern States Pavement Management and Design Conference, Panama City, FL, May 7-10, 2006.
Wu, Y., Gupta*, S., Ts Tsai, Y. (2005) “Application of video image pattern recognition on roadway safety analyses,” invited by Turner-Fairbank Research Center to give a presentation Washington DC, January 13, 2005.
Wu, Y., Gupta*, S., Tsai, Y. (2005), “Speech-enabled Transportation Asset Inventory Data Collection System”, 2005 Annual TRB conference.
Tsai, Y. (2004) “Image Pattern Recognition for Transportation Applications”, Hong Kong University of Science and Technology on June 6, 2004.
Tsai, Y. (2004) “Transportation Management – Routing & Scheduling” the Logistics Institute at Shandong University on June 4, 2004.
Tsai, Y. (2004) “Pavement Management/Transportation Asset Management” the Liaoning Department of Communication, June 3, 2004.
Tsai, Y. (2004) “Transportation Management – Routing & Scheduling” the National ITS center, Chinese Ministry of Communications, Beijing, June 1, 2004.
Tsai, Y. (2004) “Pavement Management/Transportation Asset Management” invited by the Office of Chinese Association of International Exchange of Personnel (CAIEP), Peking University on May 31, 2004.
Tsai, Y. (2004) “GIS for Pavement Management on Integrating GIS with Pavement Condition Forecasting and Preservation Project Selection Simulation” the 2004 Southeastern Pavement Management and Design Conference sponsored by FHWA, May 26-27, 2004 Biloxi, Mississippi.
Tsai, Y., Wu, M., and Adams, E. D. (2003), “GPS/GIS Enhanced Road Inventory System”, Annual TRB conference.
Tsai, Y. (2002) “GIS for Pavement Management on Data Integration” the 2002 Southeastern Pavement Management and Design Conference sponsored by FHWA, Nashville, Tennessee.
Tsai, Y. (1999) “GIS Applications for GeoScientists” The 12th Annual Symposium on the Application of Geophysics to Environmental and Engineering problems, Oakland, California, 1999.
Phone: 
404.385.6428
2013 Excellence in Research Program Development, CEE, Georgia Tech
2011 Development of Highway Construction and Maintenance Techniques for Special Environment for Western China, Sponsored by Chinese Ministry of Education (MOE) Innovation Research Team Development.
2010 Selected in the Spring/Summer 2010 Issue 16 of the Ignition magazine by the National Academy of Sciences National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) program because of his developed algorithms' scientific and social impact. (http://www.trb.org/Publications/Blurbs/163652.aspx)
2009 Elected Chinese Changjiang Scholar (one out of 244 worldwide in all areas, and only one in transportation), in recognition of his research on applying sensor and information technology on infrastructure management. The Changjiang Scholar is one of the China’s most prestigious scholar’s honors.
2005 Research Achievement Award, College of Architecture, Georgia Tech
2002 Research Development Award, College of Architecture, Georgia Tech
1996 NCGIA (National Center for Geographic Information and Analysis) GIS and Environmental Modeling Scholarship
1993 TAU BETA PI Honor Society Member
1991 Honored as Model 2nd Lt., Army, R.O.C.
1987 Scholarship for Outstanding Students, Education Ministry, R.O.C.
1985 Scholarship for Outstanding Students, Private Fund of Mr. Lin
1984 Honored for the Cultural Services around Taiwan Villages, Education Ministry, R.O.C.
Middle: 
James
Interdisciplinary Research Area(s): 
Smart Cities
Sustainable Communities