Principal Investigator, "Development of Mix Design process (Foam Asphalt)." Iowa Department of Transportation ($270,513), July 2002 to June 2006.

Principal Investigator, "Evaluation of Long-Term Field Performance of Cold In-Place Recycled Roads." Iowa Department of Transportation ($47,275), January 2004 to February 2006.

Principal Investigator, "Development of Commercial-Grade Bi-Axial Strain Transducer." TRB ($160,000), January 2001 to July 2004.

Principal Investigator, "Development of a Manual Crack Quantification and an Automated Crack Measurement System." Iowa Department of Transportation ($73,997), April 2001 to June 2004.

Kim, Y. and H. Lee, “Development of Mix Design Procedure for Cold In-Place Recycling with Foamed Asphalt,” Journal of Materials in Civil Engineering, ASCE, February, 2006.

Lee, H. and J. Kim, “Analysis of Errors in Ground Truth Indicators for Evaluating the Accuracy of Automated Pavement Surface Image Collection and Analysis System for Asset Management,” Pavement Surface Condition/Performance Assessment: Procedures and Technologies, ASTM, JAI 9021, 2006.

Lee, H. and J. Kim, “Development of Crack Type Index,” Transportation Research Record: Journal of Transportation Research Board, TRB, National Research Council, Washington, D.C., 2005.

Nishiyama, T., H. Lee, and A. Bhatti, “Investigation of Bonding Condition in Concrete Overlay by Laboratory Testing, Finite Element Modeling and Field Evaluation,” Transportation Research Record: Journal of Transportation Research Board, TRB, National Research Council, Washington, D.C., 2005.

Lee, B. J. and H. Lee, "A Robust Position Invariant Neural Network for Digital Pavement Crack Analysis." Computer-Aided Civil and Infrastructure Engineering, Blackwell Publishing, 19, 2004, pp. 105-118.

Raman, M, M. Hossain, R. Miller, G. Cumberledge, H. Lee, and K. Kang, “Assessment of Image-Based data Collection and the AASHTO Provisional Standard for Cracking on Asphalt-Surfaced Pavements,” Transportation Research Record: Journal of Transportation Research Board, No. 1889, TRB, National Research Council, Washington, D.C., 2004, pp. 166-125.

Obadat, M., H. Lee, A. Bhatti, and B. Maclean, "Full-Scale Evaluation of MEMS-base Bi-Axial Strain Trasducer and its Application. "Journal of Aerospace Engineering, ASCE, Vol. 16, No. 3, July 2003, pp. 100-107.

Lee, H., H. B. Yun, and B. Maclean, "Development and Field Testing of a Prototype Hybrid Uniaxial Strain Transducer." NDT&E International, Elsevier, Vol. 35, No.2, March 2002, pp. 125-134.

Yun, H. B., H. Lee, and B. Maclean, “Evaluation of Hybrid Uni-Axial Strain Transducer for Rail Infrastructure," Transportation Research Record: Journal of Transportation Research Board, No. 1742, TRB, National Research Council, Washington, D.C., 2001, pp. 78-86.