CEE Faculty Profile

Yi-Chang James Tsai

Associate Professor

Affinity Group: Transportation Systems Engineering

Office: Mason 248
Phone: 912/963-6977
Email: james.tsai@ce.gatech.edu
Web: http://www.gtsav.gatech.edu/go/faculty/tsai

Before joining the faculty at Georgia Tech, Dr. Tsai worked as a senior research scientist in the GIS center at Georgia Tech. Since 1997, he has led a research team and worked with GDOT pavement engineers, 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. 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 include 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, roadway safety, and logistics. The sensor and information technology include vision, LiDAR, GPS/GIS technologies. He has actively developed ITS applications. He is the PI of a large-scale research project entitled, Remote Sensing and GIS-enabled Asset Management (RS-GAM), sponsored by US DOT to develop an intelligent roadway asset inventory and management system using emerging LiDAR, vision, and GPS/GIS technologies. He is also the PIs for two research projects sponsored by the National Academy of Science (NAS) NCHRP IDEA program on Video image recognition algorithms to enhance roadway infrastructure data collection, and on Development of Sensing Methodology for Intelligent and Reliable Work Zone Hazard Awareness. 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.

Research Interests

Spatial optimization of sensor technology, information technology, Image and signal processing, ITS, GPS/GIS, decision-support systems for pavement/infrastructure/asset management (inventory and condition assessment, preservation, and management), roadway safety, logistics

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

Honors

  1. 2011, a recipient of ‘Thank a Teacher’ 2011, Center for the Enhancement of Teaching and Learning (CETL), Georgia Tech.
  2. Named 2009 Chinese Chang Jiang Scholar for his international recognition on pavement preservation and management using sensing and information technologies. The Chang Jiang Scholar is China’s most prestigious scholar’s honor.
  3. 2005 Research Achievement Award, College of Architecture, Georgia Tech
  4. 2002 Research Development Award, College of Architecture, Georgia Tech
  5. 1996 NCGIA (National Center for Geographic Information and Analysis) GIS and Environmental Modeling Scholarship
  6. 1993 TAU BETA PI Honor Society Member.
  7. 1991 Honored as Model 2nd Lt., Army, R.O.C.
  8. 1987 Scholarship for Outstanding Students, Education Ministry, R.O.C.
  9. 1985 Scholarship for Outstanding Students, Private Fund of Mr. Lin.
  10. 1984 Honored for the Cultural Services around Taiwan Villages, Education Ministry, R.O.C.

Articles

  1. Xu*, Y., Tsai Y. (2012) “Financial Consequences of the Delayed Pavement Rehabilitation Using LTPP Data – A Case Study”, ASCE Journal of Transportation Engineering, in press.
  2. 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, in press.
  3. 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, in press
  4. 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, in press.
  5. Wang, Z., Tsai Y. (2012) “Pavement Layer Data Repository Using A Spatio-Temporal Block Model”, ASCE Journal of Computing in Civil Engineering, in press.
  6. 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, in press.
  7. 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, in press.
  8. Ai*, C. and Tsai, Y. (2012), “A Hybrid, Active Contour Incorporated Sign Detection Algorithm”, ASCE Journal of Computing in Civil Engineering, Vol. 26(1):
  9. Chung, Y. and Tsai, Y. (2012), “Non-parametric Lens Debris Detection of Video Log Images Using Hysteresis updating” ASCE Journal of Computing in Civil Engineering, in press.
  10. 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, in press.
  11. 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.
  12. 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.
  13. 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.
  14. 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.
  15. 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.
  16. 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.
  17. 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.
  18. 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.
  19. 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.
  20. 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.
  21. Tsai, Y., Hu, Z., Wang, Z. (2010) “Vision-based Roadway Geometry Computation” ASCE Journal of Transportation Engineering, Vol. 136(3):223-233.
  22. 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.
  23. 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.
  24. 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.
  25. 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.
  26. 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.
  27. 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.
  28. 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.
  29. 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.
  30. 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.
  31. 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.
  32. 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.
  33. 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.
  34. 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.
  35. 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.
  36. 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.

Proceedings

  1. 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.
  2. 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.
  3. Tsai, Y., Wang*, C., Wu, Y. (2011) “A Vision-based Approach to Study Driver Behavior in Work zone Areas” the 3rd International Conference on Road Safety and Simulation, September 14-16, 2011, Indianapolis, U.S.
  4. 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, August 16-20, 2010, New York, U.S.
  5. 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 (oral presentation, 8.9% acceptance rate).
  6. Tsai, Y., Ai, C., Wu, Y., and Siplon, P. (2010), "Simulating Port Logistics Operations Using 3D Visualization Technology", accepted for the proceedings of the International Conference on Civil and Building Engineering (ICCCBE), June 30 - July 2, 2010, Nottingham, UK.
  7. Tsai, Y. (2010), "Developing an Intelligent Sign Inventory Using Image Processing", accepted for the proceedings of the International Conference on Civil and Building Engineering (ICCCBE), June 30 - July 2, 2010, Nottingham, UK.
  8. Tsai, Y. and Umare, K. (2010), "A parallelized image polygon detection algorithm for road sign inventory", accepted for the proceedings of the International Conference on Civil and Building Engineering (ICCCBE), June 30 - July 2, 2010, Nottingham, UK.
  9. 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.
  10. 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.
  11. 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.
  12. 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", May 11-12, 2009, Waltham, MA, USA.
  13. 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, June, 2008, Galgary, Canada.
  14. Tsai, Y., Wu, Y., Pitts, E. (2008), "Improving GDOT's Annual Preventive Maintenance Using A Collaborative Decision Support System", Proceedings of the 7th international conference on managing pavement assets, June, 2008, Galgary, Canada.
  15. Tsai, Y., Yang, C., Wang, Z. (2006) Spatial Clustering for Determining Economical Highway Pavement Let Projects, GeoCongress 2006 Geotechnical Engineering in the Information Age, February 26 !! March 1, 2006, Atlanta, GA.
  16. 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, February 26 !! March 1, 2006, Atlanta, GA.
  17. 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.
  18. 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.
  19. Tsai Y. (2005) Roadway Safety Enforcement Using Image Pattern Recognition, the 5th International Conference of Chinese Transportation Professionals, hosted in Changan University, Xian, China on June 25-26, 2005.
  20. 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.
  21. 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.
  22. 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.
  23. 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.
  24. 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.
  25. 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.
  26. 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.
  27. 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.

Presentations

  1. Tsai, Y. (2012) Critical Assessment of Crack Detection and Classification Using Three-Dimensional Laser Technology, 2012 Annual TRB conference, Washington DC.
  2. Tsai, Y. (2012) Remote Sensing and GIS-Enabled Roadway Asset Management , 2012 Annual TRB conference, Washington D.C.
  3. 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.
  4. 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.
  5. 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.
  6. Tsai, Y. (2012) Developing Sensing Methodology for Intelligent and Reliable Work Zone Hazard Awareness, 2012 Annual TRB conference, Washington D.C.
  7. 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.
  8. 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.
  9. 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.
  10. Tsai, Y., Kaul*, V., Yezzi, A. (2011) Automating the Crack Map Detection Process for Machine Operated Crack Sealer, 2011Annual TRB conference, Washington, D.C.
  11. Wang, Z., Tsai, Y., Pitts, E. (2011) Study of Budget Shortfall Impact on Long-term Pavement Preservation, 2011Annual TRB conference, Washington, D.C.
  12. Huang* Y., Tsai, Y. (2011) Enhanced Pavement Distress Segmentation Algorithm using Dynamic Programming and Connected Component Analysis, 2011Annual TRB conference, Washington, D.C.
  13. 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.
  14. 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.
  15. 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.
  16. 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.
  17. 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.
  18. 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.
  19. 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 to be presented in 2010 TRB conference)
  20. 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.
  21. Tsai Y., Wu, Y., and Pitts E. (2006) “Implementing an Enhanced GDOT Pavement Preservation Program”, 2006 Annual TRB conference.
  22. Wang, Z., Tsai, Y., Rabun, J. T. (2006) “An Integrated Pavement Structure Profile Information System”, 2006 Annual TRB conference.
  23. Tsai, Y. (2006) “Lessons Learned: How to Successfully Implement GAM”, 2006 SASHTO, August 4 – 9, 2006, Atlanta, GA.
  24. Tsai, Y. (2006) ‘Update on GIS and PMS’ in the Southeastern States Pavement Management and Design Conference, Panama City, FL, May 7-10, 2006.
  25. Tsai, Y. (2006) “IT-based Asset Management”, invited by Chinese Department of Communication Beijing, China, November 1, 2006.
  26. 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.
  27. Wu, Y., Gupta*, S., Tsai, Y. (2005), “Speech-enabled Transportation Asset Inventory Data Collection System”, 2005 Annual TRB conference.
  28. 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.
  29. Tsai, Y. (2004) “Transportation Management – Routing & Scheduling” the National ITS center, Ministry of Communications, June 1, 2004.
  30. Tsai, Y. (2004) “Pavement Management/Transportation Asset Management” the Liaoning Department of Communication, June 3, 2004.
  31. Tsai, Y. (2004) “Transportation Management – Routing & Scheduling” the Logistics Institute at Shandong University on June 4, 2004.
  32. Tsai, Y. (2004) “Image Pattern Recognition for Transportation Applications”, Hong Kong University of Science and Technology on June 6, 2004.
  33. 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.
  34. Tsai, Y., Wu, M., and Adams, E. D. (2003), “GPS/GIS Enhanced Road Inventory System”, Annual TRB conference.
  35. Tsai, Y. (2002) “GIS for Pavement Management on Data Integration” the 2002 Southeastern Pavement Management and Design Conference sponsored by FHWA, Nashville, Tennessee.
  36. Tsai, Y. (1999) “GIS Applications for GeoScientists” The 12th Annual Symposium on the Application of Geophysics to Environmental and Engineering problems, Oakland, California, 1999.

Reports

  1. Tsai, Y. (2009), "Using Image Pattern Recognition Algorithms for Processing Video Log Images to Enhance Roadway Infrastructure Data Collection", NCHRP IDEA-121 Final Report.
  2. Tsai, Y., Ai, C., Hu, Z. (2009), "Exploring Methods for GDOT's Comprehensive Maintenance Quality Control - Feasibility Study", Final Report, Georgia Department of Transportation.
  3. Tsai, Y. and Wang, Z. (2009), "Using Image Processing for Pavement Crack Growth Measurement - A Feasibility Study", Final Report, Georgia Department of Transportation.
  4. Tsai, Y. (2005), "Development of Optimization Modules for GDOT Pavement Management System", Final Report, Georgia Department of Transportation.