PUBLICATIONS

Journal Papers

(* Corresponding author; __ Advisees)

  1. Hennessy, E.* and Ai, C. (2023). “A Comparative Analysis of Pedestrian Network Connectivity and Accessibility Using Network Approximation.” Journal of Transport Geography. 111, 103637. [Link].
  2. Wang, W., Cui, D., Ai, C., Zaheer, Q., Wang, J.*, Qiu, S., Li, F., and Xiong, J. (2023). “Target-free recognition of cable vibration in complex backgrounds based on computer vision.” Mechanical Systems and Signal Processing. 197, 110392. [Link].
  3. Ryan, A.*, Ai, C., Fitzpatrick, C., and Knodler, M. (2023). “Developing a Geospatial Safety Analysis Tool: A Systematic Approach to Identify Safety-Critical Horizontal Curve Segments and Hazardous Contributing Factors.” Journal of Transportation Engineering, Part A: Systems. 149(7), 04023051. [Link].
  4. Wang, J., Ai, C., Chen, Y., A, R., Wang, W., and Qiu, S.* (2023). “Position-track-time Three-dimensional Network Model Based Optimization for Train Timetable and Station Operation Plan of High-speed Railway.” Computer-Aided Civil and Infrastructure Engineering. 38(6), 720-738. [Link].
  5. Ren, Y.*, Lu, P., Dai, Z., Ai, C., and Tolliver, D. (2023). “Risk-Based Rail Gage Inspection Using iPhone 12 Pro.” Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit. 237(4), 429–437. [Link].
  6. Ryan, A.*, Hennessy, E., Ai, C., Kwon, W., Fitzpatrick, C., and Knodler, M. (2022). “Driver Performance at Horizontal Curves: Bridging Critical Research Gaps to Increase Safety.” Traffic Safety Research. 3, 000014. [Link].
  7. Hou, Q., Ai, C.*, and Boudreau, N. (2022). “Network-level Guardrail Extraction Based on 3-D Local Features from Mobile LiDAR Sensor.” Journal of Computing in Civil Engineering, 36(6), 04022035. [Link].
  8. Hou, Q., and Ai, C.* (2022). “An Automated Sound Barrier Inventory Method Using Mobile LiDAR.” Journal of Transportation Engineering, Part A: Systems. 148(10), 04022078. [Link].
  9. Ren, Y.*, Ai, C., Lu, P., Dai, Z., and Wang, H. (2022). “An Automated Rail Extraction Framework for Low-density LiDAR Data without Sensor Configuration Information.” IEEE Sensors Journal, 22(13), 13234. [Link].
  10. Tzortzinis, G., Ai, C., Breña, S., and Gerasimidis, S.* (2022). “Using 3D Laser Scanning for Estimating the Capacity of Corroded Steel Bridge Girders: Experiments, Computations and Analytical Solutions.” Engineering Structures, 265(2022), 114407. [Link].
  11. Deliali, A.*, Tainter, F., Ai, C., and Christofa, E. (2022). “A Framework for Mode Classification in Multimodal Environments Using Radar-based Sensors.” Journal of Intelligent Transportation Systems: Technology, Planning, and Operations. (Online First). [Link].
  12. Ryan, A.*, Ai, C., Fitzpatrick, C., and Knodler, M. (2022). “Crash Proximity and Equivalent Property Damage Calculation Techniques: An Investigation using a Novel Horizontal Curve Dataset.” Accident Analysis & Prevention, 166, 106550. [Link].
  13. Hu, W., Wang, W., Ai, C., Wang, J., Wang, W., Meng, X., Liu, J., Tao, H., and Qiu, S.* (2021). “Machine Vision-based Surface Crack Analysis for Transportation Infrastructure.” Automation in Construction, 132(2021), 103973. [Link].
  14. Ren, Y., Lu, P.*, Ai, C., Gao, L., Qiu, S., and Tolliver, D. (2021).“Emerging Rail TrackInspection for Local Lines: A Review.” ASCE Journal of Transportation Engineering, 147(10), 04021062. [Link].
  15. Hennessy, E.*, and Ai, C. “Roadway Lighting and Non-Motorist Crashes: A Spatial Comparison of Cambridge, MA.” (2021). Transportation Research Record: Journal of the Transportation Research Board, 2675(7), 491-500. [Link].
  16. Keramati, A., Lu, P.*, Ren, Y., Tolliver, D., and Ai, C. (2021). “Investigating the Effectiveness of Safety Countermeasures at Highway-Rail At-Grade Crossings Using a Competing RiskModel.” Journal of Safety Research, 78(2021), 251-261. [Link].
  17. Ryan, A.*, Ai, C., Knodler, M., and Fitzpatrick, C. (2020). “Evaluation of Small Unmanned Aerial System Highway Volume and Speed-Sensing Applications.” IET Intelligent Transportation Systems, 15(1), 84-97. [Link].
  18. Hou, Q., and Ai, C.* (2020). “A Network-level Sidewalk Inventory Method Using Mobile LiDAR and Deep Learning.” Transportation Research Part C:  Emerging Technologies, 119, 102772. [Link].
  19. Ai, C., Xu, G., and Qiu, S.* (2019). “An Anisotropic Heat Diffusion Model for Enhancing the Extraction of Underground Rail Track Fasteners under Extremely Low and Uneven Illumination Conditions.” Proceedings of the Institute of Mechanical Engineers Part F: Journal of Rail and Rapid Transit, 233(4), 410-419. [Link].
  20. Ai, C., Qiu, S.*, Xu, G., Zhang, A., and Wang, C. (2018). “A Non-Ballasted Rail Track Slab Crack Identification Method Using a Level Set Based Active Contour Model.” Computer-Aided Civil and Infrastructure Engineering, 33(7), 571-584. [Link].
  21. Tsai, Y., Pranav, C.P.*, Wu, Y., and Ai, C.. (2018). “Identification of Site Characteristics for Proactive High-Friction Surface Treatment Site-Selection Using Sensor-Based, Detailed, Location-Referenced Curve Characteristics Data.” Transportation Research Record: Journal of the Transportation Research Board, 2672(38), 69-80. [Link].
  22. Tsai, Y. and Ai, C.*. (2017). “Automated Superelevation Measurement Method Using a Low-Cost Device: An Efficient, Cost-Effective Approach Toward Intelligent Horizontal Curve Safety Assessment.” Transportation Research Record: Journal of the Transportation Research Board, 2621(1), 62-70. [Link].
  23. Ai, C.* and Tsai, Y. (2016). “Automated Traffic Sign Retroreflectivity Condition Assessment Using Mobile LIDAR and Computer Vision.” Transportation Research Part C:  Emerging Technologies, 63, 96-113. [Link].
  24. Ai, C.*, and Tsai, Y. (2016). “Automated Sidewalk Assessment Method for Americans with Disabilities Act Compliance Using Three-Dimensional Mobile Lidar.” Transportation Research Record: Journal of the Transportation Research Board, 2542(1), 25-32. [Link].
  25. Ai, C.* and Tsai, Y. (2015). ”Automatic Horizontal Curve Identification and Measurement Method Using GPS Data.” ASCE Journal of Transportation Engineering, 141(2), 04014078. [Link].
  26. Ai, C.* and Tsai, Y. (2015). “Critical Assessment of an Enhanced Traffic Sign Detection Method Using Mobile LiDAR and INS Technologies.” ASCE Journal of Transportation Engineering, 141(5), 04014096. [Link].
  27. Ai, C.* and Tsai, Y. (2015). “Geometry Preserving Active Polygon-Incorporated Sign Detection Algorithm.” ASCE Journal of Computing in Civil Engineering, 29(6), 04014092. [Link].
  28. Tsai, Y., Ai, C.*, Wang Z., and Pitts, E. (2013). “Mobile Cross Slope Measurement Method Using LiDAR Technology.” Transportation Research Record: Journal of the Transportation Research Board, 2367(1), 53–62. [Link].
  29. Tsai, Y., Wu, Y.*, Ai, C., and Pitts, E. (2012). ”Critical Assessment of Measuring Concrete Joint Faulting Using 3D Continuous Pavement Profile Data.” ASCE Journal of Transportation Engineering, 138(11), 1291–1296. [Link].
  30. Tsai, Y.*, Dusanter, T., Wu, Y., Ai, C. and Caitucoli, Q. (2012). “Automatic Truck Processing Time Extraction at Marine Container Terminal Gates Using Low Frame Rate Images.” Journal of Intelligent Transportation Systems, 16(4), 211–225. [Link].
  31. Ai, C., and Tsai, Y.* (2012). ”Hybrid Active Contour–Incorporated Sign Detection Algorithm.” ASCE Journal of Computing in Civil Engineering, 26(1), 28–36. [Link].

Patents

  1. Ai, C., Tsai, Y., Wang, Z., and Yezzi, A. “Systems and Methods for Identifying Traffic Control Devices and Testing the Retroreflectivity of the Same.” U.S. Patent US9767371 B2 (Granted on Sept. 19th, 2017). [Link].

Technical Reports 

  1. Ai, C. and Hou, Q. (2022). “Low-Cost Crowdsourcing-Based Infrastructure Mapping for Pedestrian Accessibility.” MassVenture. [Report upon request][UMass News][MassVenture News]. 
  2. Ai, C. and Hennessy, E. (2022). “A Method for Pavement Marking Inventory and Retroreflectivity Condition Assessment Using Mobile LiDAR.” Massachusetts Department of Transportation, Report No. 22-030. [Link].
  3. Ai, C. and Hou, Q. (2022). “Automated Guardrail Inventory and Condition Evaluation.” Massachusetts Department of Transportation, Report No. 21-031. [Link].
  4. Christofa, E., Ai, C., Deliali, A., Tainter, F., Cesic, L., Hannon, T., and Kostopoulou, E. (2021). “Effectiveness of Bike Boxes in Massachusetts.” Massachusetts Department of Transportation, Report No. 21-021. [Link].
  5. Fitzpatrick, C., Knodler, M., Ryan, A., Ai, C., and Chen, D. (2019). “The Application of Unmanned Aerial Systems in Surface Transportation-Volume II-C: Evaluation of UAS Highway Speed-Sensing Application.” Massachusetts Department of Transportation, Report No. 19-010. [Link].
  6. Ai, C., and Hou, Q. (2019). “Improving Pedestrian Infrastructure Inventory in Massachusetts using Mobile LiDAR.” Massachusetts Department of Transportation, Report No. 19-007. [Link][AASHTO Sweet Sixteen 2020].
  7. Tsai, Y., Ai, C., and Wu, Y. (2017). “Curve Identification for High Friction Surface Treatment (HFST) Installation Recommendation.”  Georgia Department of Transportation 15-05. [Link].
  8. Tsai, Y., Wang, Z., and Ai, C. (2017). “Implementation of Automatic Sign Inventory and Pavement Condition Evaluation on Georgia’s Interstate Highways.” Georgia Department of Transportation 15-11. [Link][AASHTO Sweet Sixteen 2017][Georgia Tech News].
  9. Tsai, Y., and Ai, C. (2016). “Delta TechOps Parking Lot Traffic and Employee Safety Improvement Study.” Final Report, Delta TechOps RG274. [Report upon request].