Current Research Projects

Publications

• Parr, M.J., Connor, R.J., and Bowman, M.D. (2009). "A Proposed Method for Determining the Interval forHands-On Inspection of Steel Bridges with Fracture Critical Members," Journal of Bridge Engineering, ASCE, Accepted for publication.
• Akinci, N.O., Liu, J., and Bowman, M.D. (2008). "Parapet Strength and Contribution to Live Load Response for Superload Passages," Journal of Bridge Engineering, ASCE, 13(1); 55-63.
• Chotickai, P. and Bowman, M.D. (2006). "Comparative Study of Fatigue Provisions for the AASHTO Fatigue Guide Specifications and the LRFD Manual for Evaluation," Journal of Bridge Engineering, ASCE, Submitted and under re-review.
• Wood, S.M., Akinci, N.O., Liu, J., and Bowman, M.D. (2006). "Analysis and Instrumentation of a Steel Bridge for Investigating the Effects of Superloads". Transportation Research Board, Accepted to Publication.
• Chotickai, P. and Bowman, M.D. (2006). "Truck Models for Improved Fatigue Life Predictions of Steel Bridges," Journal of Bridge Engineering, ASCE, 11(1); 71-80.
• Li, X., Whalen, T.M. and Bowman, M.D. (2005). "Fatigue Strength of Double-Mastarm Sign Structures for Natural Wind," Transportation Research Record, National Research Council; No. 1928.
• Barth, A.S. and Bowman, M.D. (2001). "Fatigue Behavior of Welded Diaphragm-to-Beam Connections." Journal of Structural Engineering, ASCE 27(10); 1145-1152.

• "Fatigue Design of Modular Bridge Expansion Joints", R.J. Dexter, R.J. Connor, M.R. Kaczinski, NCHRP Report 402, National Cooperative Highway Research Program (NCHRP), Washington, DC, January, 1998.
• "Inspection and Management of Bridges with Fracture-Critical Members", R.J. Dexter, R.J. Connor, H.N. Mahmoud, National Cooperative Highway Research Program, NCHRP Synthesis Report 354, National Academy Press, Washington D.C., to be published in 2005.
• "Heat-Straightening Repair of Damaged Steel Bridge Girders - Fatigue and Fracture Performance", R.J. Connor, M.R. Urban, E.J. Kaufmann, NCHRP Report 604, National Cooperative Highway Research Program (NCHRP), Washington, DC, January, 2008.
• "Bridge Deck Design Criteria and Testing Procedures - Final Report for NCHRP Project, 10-72", R.J. Connor, J. Liu, C. Higgins, National Cooperative Highway Research Program National Academies, Washington, DC, July, 2012.
• "Development of Fatigue Loading and Design Methodology for High-Mast Light Poles", R.J. Connor, S.H. Collicott, A.M. DeSchepper, R.J. Sherman, and J.A. Ocampo., NCHRP Report 718, National Cooperative Highway Research Program (NCHRP), Washington, DC, 2012.

• Kozy, B.M., Connor, R.J., Paterson, D., Mertz, D.R., "Proposed Revisions to the AASHTO LRFD Bridge Design Specifications for Orthotropic Steel Deck Bridges", Journal of Bridge Engineering, American Society of Civil Engineers. Volume 16, Issue 6, pp. 759-767, November/December, 2011.
• Higgins C., Turan, T., Connor, R.J., Liu, J, "A Unified Approach for LRFD Live Load Moments in Bridge Decks", Journal of Bridge Engineering, American Society of Civil Engineers. Volume 16, Issue 6, pp. 804-811, November/December, 2011.
• Higgins C., Turan, T., Connor, R.J., "Rapid Ranking Procedure for Gusset Plate Connections in Existing Steel Truss Bridges", Journal of Bridge Engineering, American Society of Civil Engineers Volume 15, Issue 5, pp. 581-596, September/October, 2010.
• Parr M.J., Connor R.J. Bowman M., "A Method for Determining the Interval for Hands-on Inspection of Steel Bridges with Fracture Critical Members", Journal of Bridge Engineering, American Society of Civil Engineers Vol. 15, No. 4, July/August 2010, pp. 352-363.
• Warpinski, M.K, Connor, R.J., Hodgson, I.C., "The Influence of Flexibility on the Fatigue Performance of the Base Plate Connection in High-mast Lighting Towers", Journal of Structural Engineering, American Society of Civil Engineers, Vol. 136, No. 3, March 2010, pp. 324-329.
• Hall, J, Connor, R.J., "The Influence of Baseplate Flexibility on the Fatigue Performance of Welded Socket Connection", Journal of Structural Engineering, American Society of Civil Engineers, Vol. 134, No. 6, June 2008, pp. 911-918.

• G. Yan, W. Guo, S.K. Dyke, and C. Lu, "Experimental Validation of the Multi-Level Damage Localization Technique with Distributed Computation", Smart Structures and Systems: Special Issue on Wireless Sensor Advances and Applications to Monitoring of Civil Infrastructure, pp. July, 2010
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• N. Castaneda, S.J. Dyke, C. Lu, F. Sun and G. Hackman, "Experimental Deployment and Validation of a Distributed SHM System Using Wireless Sensor Networks," Journal of Structural Engineering and Mechanics, Techno-Press, Vol. 32; No. 6; August, 2009.
• D. Giraldo, W. Song, S.J. Dyke, and J.M. Caicedo, "Modal Identification through Ambient Vibration: A Comparative Study," Journal of Engineering Mechanics, ASCE, Volume 135, Issue 8, pp. 759-770.
• G.J. Yun, K.A. Ogorzalek, S.J. Dyke, and W. Song, "A Two-Stage Damage Detection Approach Based on Subset Selection and Genetic Algorithms," Smart Structures and Systems, Vol. 5 (1), pp. 1-21, 2008.
• W. Song, S.J. Dyke, G.J. Yun and T. Harmon, "Improved Damage Localization and Quantification using Subset Selection", Journal of Engineering Mechanics, ASCE, Vol. 135, No. 6, June 2009, pp. 548-560, (doi 10.1061/(ASCE)EM. 1943-7889.0000005).
• S.J. Dyke, R. Christenson, Z. Jiang, X. Gao and Z. Feinstein, "Tele-operation Tools for Benchscale Shake Tables for Instruction in Earthquake Engineering," Seismological Research Letters, Seismological Society of America, Vol. 78, No. 4, July-August, 2007.
For complete list in PDF form . . .

• Bice, J.K. and Frosch, R.J., "A Parametric Study of Design Factors Influencing Cracking from Restrained Shrinkage," ASCE Journal of Bridge Engineering, in progress.
• Bice, J.K. and Frosch, R.J., "Simplified Modeling of Restrained Volume Changes in Concrete Slabs," ACI Structural Journal, in progress.
• Pay, A.C. and Frosch, R.J., "Bond Strength of Reinforcement: A Unified Theory," ACI Structural Journal, in progress.
• Pay, A.C., Canbay, E., and Frosch, R.J., "Experimental Evaluation of Beams with Spliced FRP Reinforcement," ACI Structural Journal, in progress.
• Calabrese, D.M., Wilken, D., and Frosch, R.J., "Bowing of Brick Precast Panels caused by Differential Shrinkage," PCI Journal, submitted.
• Saqan, E.I. and Frosch, R.J., "Influence of Flexural Reinforcement on Shear Strength of Prestressed Beams without Web Reinforcement," ACI Structural Journal, Vol. 106, No. 1, January-February 2009, pp. 60-68.

• A. Irfanoglu, "Using Numerical Simulations and Engineering Reasoning under Uncertainty: Studying the Collapse of WTC-1", Computer-aided Civil and Infrastructure Engineering, accepted for publication, 2010.
• B.N. Luna, and A. Irfanoglu, "Estimating Base Shear versus Roof Drift Curves using Earthquake-Response Data", Earthquake Spectra, accepted for publication, 2010.
• K.A. Korkmaz, A. Irfanoglu and A. H. Kayhan, "Seismic Risk Assessment of Buildings in Izmir, Turkey," Natural Hazards, September 2009 (online), 2010 (print).
• K. Miamis, A. Irfanoglu, and M.A. Sozen, "Dominant Factor in the Collapse of WTC-1", Journal of Performance of Constructed Facilities, v.23(4):203-208, 2009.
• A. Irfanoglu, "Performance of Template School Buildings during Earthquakes in Turkey and Peru", Journal of Performance of Constructed Facilities, v.23(1):5-14, 2009
• Irfanoglu, A., and C.M. Hoffmann, "An Engineering Perspective of the Collapse of WTC-I", Journal of Performance of Constructed Facilities. v.22(1):62-67, 2008.
• Griffiths, J.H.P., A. Irfanoglu and S. Pujol, “Istanbul at the Threshold: An Evaluation of the Seismic Risk in Istanbul”, Earthquake Spectra, v.23 (1): 63-75, 2007.
• Beck, J.L., E. Chan, A. Irfanoglu and C. Papadimitriou, "Multi-criteria Optimal Structural Design under Uncertainty", Earthquake Engineering and Structural Dynamics, 28:741-761, 1999.

• Whalen, T.M., Savage, G.T., and Jeong, G.D., (2004), "An Evaluation of the Self-Determined Probability-Weighted Moment Method for Estimating Extreme Wind Speeds," Journal of Wind Engineering and Industrial Aerodynamics, Vol. 92, pp. 219-239.
• Whalen, T.M., Savage, G.T., and Jeong, G.D., (2002).  "The Method of Self-Determined Probability Weighted Moments Revisited," Journal of Hydrology, Vol. 268, pp. 177-191.

• Birrcher, D.B., Bayrak, O. and Kreger, M.E., "Effects of Increasing the Allowable Compressive Stress at Prestress Transfer," American Concrete Institute Structural Journal, Vol. 107, No. 1, January-February 2010, pp. 21-31.
• Eskridge, A.E., Klahorst, J.T., Klingner, R.E., and Kreger, M.E., "Mitigation Techniques for Structures with Premature Concrete Deterioration," American Concrete Institute Materials Journal, Vol. 106, No. 3, May-June 2009, pp. 273-280.
• Matsumoto, E.E., Waggoner, M.C., Kreger, M.E., Vogel, J. and Wolf, L., "Development of a Precast Bent Cap System," Journal of the Prestressed Concrete Institute, 2007.
• Luthi, T., Diephuis, J.R., Icaza, J.J., Breen, J.E. and Kreger, M.E., "Effects of Duct Types and Emulsifiable Oils on Bond and Friction Losses in Post-Tensioned Concrete," American Society of Civil Engineers  Bridge Engineering Journal, 2007.
• Birrcher, D.B., Tuchscherer, R.G., Mraz, D., Castro, A., Bayrak, O. and Kreger, M.E., "Effects of Increasing the Allowable Compressive Release Stress of Pretensioned Girders," Proceedings, Precast/Prestressed Concrete Institute Bridge Conference - Bridges for Life, Grapevine, Texas, October 23-25, 2006, 20 pp.

• Lombardi, N.J.*, and Liu, J. (2010) "Steel Hexagonal Honeycomb Core Equivalent Elastic Moduli for Bridge Deck Sandwich Panels," ASCE Journal of Aerospace Engineering, January 2010.
• Machado, M.*, Liu, J. and Sotelino, ED. (2008) "Modeling Technique for Honeycomb FRP Deck Bridges via Finite Elements," ASCE Journal of Structural Engineering Special Issue dedicated to the 17th Analysis and Computation Conference, April 2008, Vo. 134, Issue 4, pp. 572-580.
• Akinci, N.O.*, Liu, J. and Bowman, M.D. (2008) "Parapet Strength and Contribution to Live Load Response for Superload Passages," ASCE Journal of Bridge Engineering, January/February 2008, Vol. 13, Issue 1, pp. 55-63.
• Gauthier, J.F.*, Whalen, T.M., and Liu, J. (2007) “Experimental Validation of the Higher Order Derivative Discontinuity Method for Damage Detection,” accepted for publication in Structural Control and Health Monitoring, January 2007.
• Liu, J. and Karbhari, V.M. (2007) “Performance and Design of Fibre-Reinforced Polymer Composites at Cold Temperatures – Current Status and Future Needs,” International Journal of Materials & Product Technology, Vol. 28, No. 1/2, pp. 1-7.
• Wood, S.M*., Akinci, N.O.*, Liu, J. and Bowman, M.D. (2006) “Analysis and Instrumentation of a Steel Bridge for Investigating the Effects of Superloads,” Transportation Research Record, 06-1903, No. 1976, pp. 95-103.

• Pujol S., Rautenberg J., and Sozen, M., "A New Look at the Metaphor of the Bottle-Shaped Strut," submitted to Concrete International.
• Pujol S., and Fick D., "The Test of a Full-Scale Three-Story RC Structure with Masonry Infill Walls," submitted to Engineering Structures, on 6 January, 2010.
• Pujol S., and Sozen, M., "Tests at High Strain Rates of A706 Steel Reinforcing Bars with Mechanical Splices," submitted to Concrete International on 29 September 2009.
• Bedirhanouglu, I., Ilki A., Pujol S., Kumbasar N., "Seismic Behavior of Joints Built with Plan Bars and Low-Strength Concrete," accepted for publication in the ACI Structural Journal.
• Sozen M., Pujol S., "A Sensor for Confident Identification of Structural Damage in Reinforced Concrete Buildings," Accepted for publication in Smart Structures and Systems.
• Chin J.C., Rautenberg JM, Ma C.Y.T., Pujol S., and Yau D.K.Y., (2009). "An Experimental Low-cost, Low-data-rate Rapid Structural Assessment Network," IEEE Sensors Journal, Vol. 9, No. 11.
• Pujol S., Smith-Pardo J.P., (2009). "A New Perspective on The Effects of Abrupt Column Removal," Engineering Structures, Vol. 31, No. 4, pp. 869-874.
For complete list in PDF form . . .

• Huo, H., Bobet, A., Fernandez, G., and Ramirez, J.A., (in press-accepted for publication) "Load Transfer Mechanisms between Underground Structure and Surrounding Ground: Evaluation of the Failure of the Daikai Station," ASCE Journal of Geotechnical Engineering.
• Smith, J.P., Ramirez, J.A., and Poston, R.W., (in press-accepted for publication)"Distribution of Compressive Stresses in Transversely Post-tensioned Concrete Bridge Decks," ASCE Journal of Bridge Engineering.
• Pujol, S., Sozen, M. A., and Ramirez. J. A., (2006) "On the Effects of the Quindio Earthquake," EERI Spectra, (in press-accepted for publication).
• Pujol, S., Sozen, M. A., and Ramirez. J. A., (2006) "Dislacement History Effects on Drift Capacity of Reinforced Concrete Columns," ACI Structural Journal, 103(2), 253-262.
• Bobet, A., Ramirez, J.A., and Parra-Montesinos, G., (2006) "Performance of the Daikai Subway Station during the Great Hanshin Earthquake," ACI Structural Journal, 103(1), 113-122.
• Ramirez, J.A., Olek, J. and Malone, B., (2004) "Shear Strength of Lightweight Reinforced Concrete Beams," American Concrete Institute, Special Publication: High-Performance Structural Lightweight Concrete, SP-218,69-90.

• P.F. Mlakar, D.O. Dusenberry, J. R. Harris, G. Haynes, L.T. Phan and M.A. Sozen, "September 11, 2001, Airliner Crash into the Pentagon", Journal of Performance Constructed Facilities, 19 (3), August 2005, 189-196.
• P.F. Mlakar, D.O. Dusenberry, J. R. Harris, G. Haynes, L.T. Phan and M.A. Sozen, "Description of Structural Damage Caused by the Terrorist Attack on the Pentagon," Journal of Performance Constructed Facilities, 19 (3), August 2005, 197-205.
• P.F. Mlakar, D.O. Dusenberry, J. R. Harris, G. Haynes, L.T. Phan and M.A. Sozen, "Toughness of the Pentagon Structure," Journal of Performance Constructed Facilities, 19 (3), August 2005, 206-211.
• P.F. Mlakar, D.O. Dusenberry, J. R. Harris, G. Haynes, L.T. Phan and M.A. Sozen, "Response to Fire Exposure of the Pentagon Structural Elements," Journal of Performance Constructed Facilities, 19 (3), August 2005, 212-219.
• P.F. Mlakar, D.O. Dusenberry, J. R. Harris, G. Haynes, L.T. Phan and M.A. Sozen, "Conclusions and Recommendations from the Pentagon Crash," Journal of Performance Constructed Facilities, 19 (3), August 2005, 220-221.
• P.E. Mlakar, D.O. Dusenberry, J.R. Harris, G.F. Haynes, L.T. Phan, and M.A. Sozen, "The Pentagon Building Performance Report", American Society of Civil Engineers, Reston, VA, 2003, 75p.

• Kowalkowski, K.* and Varma, A. H. (2006) "Structural Properties of Steels Subjected to Multiple Cycles of Damage Followed by Heating Repair," Journal of Structural Engineering, tentatively accepted for publication, ASCE.
• Prabhu, M., Varma, A. H.*, Buch, N., and Thandavesvara, D. (2006) "Experimental Evaluation of Dowel Misalignment on Joint Pullout Behavior," Transportation Research Record: Journal of the Transportation Research Board, recommended for publication, TRB, Washington, D.C.
• Kowalkowski, K. and Varma, A. H. (2005) "Experimental Investigations of the Effects of Multiple Damage-Heat Straightening Repair Cycles on the Structural Properties of Bridge Steels." Transportation Research Board, recommended for publication, TRB, Washington, D.C.
• Varma, A. H., Sause, R., Ricles, J.M., and Qinggang, L. (2005) "Development and Validation of Fiber Models for High Strength Sqwuare CFT Beam-Columns." ACI Structural Journal, American Concrete Institute, 102, 1, 73-85, Farmington Hills, MI.
  
• Varma, A. H., Ricles, J.M., Sause, R., and Ream, A. (2004) "Seismic Behavior and Design of High Strength Square Concrete Filled Steel Tube Beam-Columns," Journal of Structural Engineering, ASCE, 130, 2, 169-179.
• Varma, A.H. , Ricles, J.M., Sause, R., and Lu, L.W. (2002). "Seismic Behavior and Modeling of High Strength Composite Concrete Filled Steel Tube Beam-Columns," Journal of Constructional Steel Research, Elsevier Applied Science, Volume 58, Issue 5-8, pp. 725-758.

Transportation

Current Research Projects	Publications
7/1/2005 - 9/30/2007, Indiana Department of Transportation and Federal Highway Administration (JTRP), Implementation of Station Health Monitoring Procedures for ITS Sensors, Bullock. 4/1/05 - 6/30/06, University of Idaho USDOT DTRS98-G-0027, Design Criteria for Enhanced Pedestrian Indications, Bullock. 8/1/05 - 7/31/07, National Science Foundation, Stochastic Sensing Control Models for Safe and Efficient Traffic Signal Strategies, Peeta, Bullock and Urbanik 1/1/05 - 7/2/07, University of Idaho (USDOT ITS-SPR), Mobile (Hands-On Traffic) Signal Timing Training (MOST), Bullock. 11/1/04 - 09/30/07, Texas A&M, National Cooperative Highway Research Project 3-79, Measuring And Predicting Performance Of Automobile Traffic On Urban Streets, Bullock. 9/1/04 - 12/31/06, Siemens Energy and Automation (USDOT DTFH61-01-R-00088), ACS-Lite, Bullock.	Garcia, C., R. Huebschman, D. Abraham, and D. Bullock, "Using GPS to Measure the Impact of Construction Activities on rural Interstates," Journal of Construction Engineering and Management, Vol. 132, No. 5, pp. 508-515, May 2006. Nichols, A. and D. Bullock, "Automatic Speed Calibration Methodology for Traffic Monitoring Sites," Journal of Transportation Engineering, ASCE, Vol 132, No. 1, pp. 30-39, January 2006. Kidarsa, R., T. Pande, S.V. Vanjari, J.V. Krogmeier, and D. Bullock, "Design Considerations for Detecting Bicycles with Inductive Loop Detectors," Transportation Research Record, TRB, National Research Council, Washington, DC, TRB Paper ID# 06-0326, submitted July 2005, accepted for publication February 2006. Smaglik, E., D.M. Bullock, T. Urbanik, and D. Bryant "Evaluation of Flow Based Traffic Signal Control Using Advanced Detection Concepts," Transportation Research Record, TRB, National Research Council, Washington, DC, TRB Paper ID# 06-1143, submitted July 2005, accepted for publication February 2006. Sharma, A.., D.M. Bullock, and S. Peeta, "Limitations of Simultaneous Gap Out Logic," Transportation Research Record, TRB, National Research Council, Washington, DC, TRB Paper ID# 06-1309, submitted July 2005, accepted for publication February 2006. Shelby, A.., D.M. Bullock, and D. Gettman, "Transition Methods in Traffic Signal Control," Transportation Research Record, TRB, National Research Council, Washington, DC, TRB Paper ID# 06-2762, submitted July 2005, accepted for publication February 2006.
FHWA/INDOT, Bicycle Safety Feasibility Study, Aug. 2005. FHWA/INDOT, Development of Integrated Land Use-Transportation Model for Indiana, Dec. 2005. FHWA/INDOT, Alternative Land Use Patterns to Minimize Congestion, Research and Education Forums - Part II, Jan. 2003. FHWA/INDOT, Synthesis of best practices in transportation security, Sep 2003. FHWA/INDOT, Review and Evaluation of INDOT's Traffic Monitoring System, Aug 2004.	Bose, Amica and J. D. Fricker, "Reverse-Engineered Land Use Patterns to Minimize Congestion", Transportation Research, Record No. 1831, January 2004, p. 141-149. Zayed, Tarek M., Chang, Luh-Maan, and Fricker, J. D., "LCCA Using Deterministic and Stochastic Methods: Conflicting Results," Journal of Performance of Constructed Facilities, American Society of Civil Engineers, Vol. 16, No. 2, p. 63-74, May 2002. Zayed, Tarek M., Chang, Luh-Maan, and Fricker, J. D., "A Statewide Performance Function for Steel Bridge Protection Programs," Journal of Performance of Constructed Facilities, American Society of Civil Engineers, Vol. 16, No. 2, p. 46-54, May 2002. Zayed, Tarek M., Chang, Luh-Maan, and Fricker, J. D., "Life Cycle Cost Based Maintenance Plan for Steel Bridge Protection Systems," Journal of Performance of Constructed Facilities, American Society of Civil Engineers, Vol. 16, No. 2, p. 55-62, May 2002. Gupta, Rajeev, J. D. Fricker, and David P. Moffett, "Video License Plate Data Reduction", Transportation Research, Record No. 1804, November 2002, p. 31-38. Yang, C.Y. David and J. D. Fricker, "Using Human Information Processing Principles to Design Advanced Traveler Information Systems", Transportation Research, Record 1759, January 2001, p. 1-8.
	Shaheed, M., W. Zhang, K. Gkritza, and Z. Hans, "A Mixed Logit Analysis of Two-Vehicle Crash Severities Involving a Motorcycle," Accident Analysis and Prevention, Special Issue on Emerging Research Methods and their Application to Road Safety (to appear). Gopalakrishnan, K., and K. Gkritza, "Forecasting Transportation Infrastructure Impacts of Renewable Energy Industry Using Neural Networks," Technological and Economic Development of Economy (to appear). Ibanez, E., V. Krishnan, S. Lavrenz, D. Mejia, K. Gkritza, J. McCalley, and A. Somani, "Resilience and Robustness in Long-term Planning of the National Energy and Transportation System," International Journal of Critical Infrastructures (to appear). Lavrenz, S., and K. Gkritza, "Environmental and Energy Impacts of Automated Electric Highway Systems," Journal of Intelligent Transportation Systems, Vol. 17 (2), 221-232 (2013) Rentziou, A., K. Gkritza, and R. Souleyrette, "VMT, Energy Consumption, and Greenhouse Gas Emissions Forecasting for Passenger Transportation," Transportation Research Part A, 46(3), 487-500 (2012). Zhang, W., K. Gkritza, N. Keren, and S. Nambisan. "Age and Gender Differences in Conviction and Crash Occurrence Subsequent to Being Directed to Iowa's Driver Improvement Program," Journal of Safety Research, 42(5), 359-365 (2011). Gkritza, K., I. Nlenanya, W. Jiang, R. Sperry, and D. Smith, "Infrastructure Impacts of Iowa's Renewable Energy," Transportation Research Record, Journal of the Transportation Research Board, 2205, 238-246 (2011). Wu. D., D.C. Aliprantis, and K. Gkritza, "Electric Energy and Power Consumption by Light-duty Plug-in Electric Vehicles," IEEE Transactions on Power Systems, 26(2), 738-746 (2011). Rentziou, A., C. Milioti, K. Gkritza, and M.G. Karlaftis, "Urban Road Pricing: Modeling Public Acceptability," ASCE Journal of Urban Planning and Development, 137(1), 56-64 (2011). Gkritza, K., M.G. Karlaftis, and F.L. Mannering, "Estimating Multimodal Transit Ridership under a Varying Fare Structure," Transportation Research Part A, 45(2), 148-160 (2011). Boeckenstedt, R., K. Gkritza, R.R. Souleyrette, and S. Nambisan, "Implications of Bioeconomy-based Fuel Production to the Transportation Infrastructure in Iowa," Transportation Research Record, Journal of the Transportation Research Board, 2191, 84-89 (2010). Anastasopoulos, P.C., B. G. McCullouch, K. Gkritza, F. L. Mannering, and K. C. Sinha, "Cost Savings Analysis of Performance-based Contracts for Highway Maintenance Operations," ASCE Journal of Infrastructure Systems, 16(4), 251-263 (2010). Gkritza, K., M. Baird, and Z. Hans. "Deer-Vehicle Collisions, Deer Density and Land Use in Iowa's Urban Deer Herd Management Zones," Accident Analysis and Prevention, 42(6), 1916-1925 (2010). Gkritza, K. , C.R. Kinzenbaw, S. Hallmark, and N. Hawkins, "An Empirical Analysis of Farm Vehicle Crash Injury Severities on Iowa's Public Road System," Accident Analysis and Prevention, 42(4), 1392-1397 (2010). Gkritza, K., "Modeling Motorcycle Helmet Use in Iowa: Evidence From Six Roadside Observational Surveys," Accident Analysis and Prevention, 41(3), 479-484 (2009).
Indiana DOT/FHWA through Joint Transportation Research Program. Development of Bridge Management System for Indiana, 2005-2007, Co-PI. Indiana DOT/FHWA through Joint Transportation Research Program. Influence of Speed on Highway Safety, 2005-2007, Co-PI.	1. Anastasopoulos, P., Labi, S., McCullouch, B., Karlaftis, M. (2010). Influence of Highway Project Characteristics on Contract Type Selection - An Empirical Assessment. Accepted for publication, ASCE Journal of Infrastructure Systems. 2. Li, Z., Labi, S., Karlaftis, M.G. (2010). Project-level Life-Cycle Cost Analysis Evaluation of Safety Hardware Improvements, Accepted for publication, Transportation Research Record. 3. Anastasopoulos, P., Labi, S., Bhargava, A., Bordat, C., Mannering, F. (2010). Frequency of change orders in highway construction using alternate count-data modeling methods. Accepted for publication in ASCE Journal of Construction Engineering and Management. 4. Lamptey, G., Singh, L., Labi, S., Sinha, K.C. (2010). Systematic Framework for Incorporating Safety in Network-Level Transportation Planning and Programming, in queue for publication, ASCE Journal of Transportation Engineering. 5. Anastasopoulos, P., Labi, S., McCullough, B. (2010). Analyzing Duration and Prolongation of Performance-based Contracts Using Hazard-based Duration and Zero-Inflated Random Parameters Poisson Models, in queue for publication, Transportation Research Record. 6. Bhargava, A., Anastasopoulos, P., Labi, S., Sinha, K.C., Mannering, F. (2010). A three-stage least squares analysis of time and cost overruns in construction contracts. Accepted for publication, ASCE Journal of Construction Engineering and Management. 7. Sinha, K.C., Patidar, V., Li, Z., Labi, S. Thompson, P.D. (2009). Establishing the Weights of Performance Criteria - Case Studies in Transportation Facility Management, ASCE Journal of Transportation Engineering, Vol. 135, p. 619-631. 8. Irfan, M., Khurshid, M., Anastasopoulos, P., Labi, S., Moavenzadeh, F. (2009). Predicting highway contract duration on the basis of project size and contract type. Accepted for publication in International Journal of Project Management. 9. Anastasopoulos, P., Labi, S., Florax, R., Karlaftis, M.G. (2009). Contracting in Highway Maintenance and Rehabilitation: Are Spatial Effects Important? Accepted for publication, Transportation Research Part A: Policy and Practice. 10. Irfan, M., Khurshid, M.B., Labi, S., Flora, W. (2009). Evaluating the Cost-effectiveness of Flexible Rehabilitation Alternatives using Different Performance Criteria, ASCE Journal of Transportation Engineering, Volume 135, Issue 10, pp. 753-763. 11. Khurshid, M.B., Irfan, M., Labi, S. (2009). An Analysis of the Cost-effectiveness of Rigid Pavement Rehabilitation Treatments. Structure & Infrastructure Engineering: Maintenance, Management, Life-Cycle Design & Performance, Taylor&Francis Group. Accepted for publication. 12. Bilal, M.K., Irfan, M., Labi, S. (2009). Comparing Methods for Evaluating Pavement Interventions - A Discussion and Case Study, Transportation Research Record 2108, p. 25-36. 13. Irfan, M., Bilal, M.K., Labi, S. (2009). Service Life of Thin HMA Overlay Using Different Performance Indicators, Transportation Research Record 2108, p. 37-45. 14. Gkritza, K., Labi, S. (2008) Estimating Cost Discrepancies in Highway Contracts: A Multi-Step Econometric Approach, ASCE Journal of Construction Engineering and Management, Vol. 134, Nr. 12, p. 953 - 962. 15. Hamideh, A., Oh, J., Labi, S., Mannering, F. L. (2008) Public Acceptance of Local Government Transportation Sales Taxes: A Statistical Assessment, State & Local Government Review 40(3). 16. Lamptey, G., Labi, S., Li, Z. (2008). Decision Support for Optimal Scheduling of Highway Pavement Preventive Maintenance within Resurfacing Cycle, in Elsevier Decision Support Systems, Vol. 46, Issue 1, p. 376-387. 17. Gkritza K., Sinha, K.C., Labi, S., Mannering, F.L. (2008). Influence of Highway Constr. Projects on Economic Development: An Empirical Assessment. Annals of Regional Science, 42:545-563. 18. Oh, J, Labi, S., Sinha, K.C. (2007). Implementation and Evaluation of Self-Financing Highway Pricing Schemes-Numerical Analysis for Indiana, Transportation Research Record 1966, p.25-33. 19. Patidar, V., Labi, S., Sinha, K.C., Thompson, P.D., Hyman, W.A., Shirole, A. (2007). Performance Measures for Enhanced Bridge Management, Transportation Research Record 1991, p. 43-53. 20. Fang, C., Labi, S. (2007). Evaluating the Static Segregation Resistance of Hardened Self- Consolidating Concrete using Image Processing Technology, Transportation Research Record 2020, p 1-9. 21. Pasupathy, R., Labi, S., Sinha, K.C. (2007). Optimal Reconstruction Periods for Stochastically-Deteriorating Infrastructures, Computer-Aided Civil and Infrastructure Engineering, Vol. 22 (6), p. 389-399. 22. Singh, P., Labi, S., Sinha, K.C. (2007). Cost-effectiveness of Warranty Projects in Indiana, ASCE Journal of Constr. Engineering and Management Vol. 133, Nr. 3, p. 217-224. 23. Labi, S., Lamptey, G., Kong, S. (2007). Effectiveness of Micro-surfacing Treatments, ASCE Journal of Transportation Engineering Vol. 133, Nr. 5, p. 298-307. 24. Rodriguez M. M., Labi, S., Li, Z. (2006). Enhanced Bridge Replacement Cost Models for Indiana's Bridge Management System, Transportation Research Record 1958, p. 13-23. 25. Labi, S. and Rodriguez, M. M., Sinha, K.C. (2006). Assessing Preservation Needs for a Bridge Network: A Comparison of Alternative Approaches, Structure & Infrastructure Engineering: Maintenance, Management, Life-Cycle Design & Performance, Taylor & Francis Group, Oct 28 Issue, p. 1-15.
Influence of speed on highway safety, Indiana Department of Transportation and the Federal Highway Administration, (with S. Labi). 2005-07. Transportation, distribution and logistics: a strategic opportunity for Indiana and Purdue, Central Indiana Corporate Partnership, (with R. Uzsoy, L. Schwarz, E. Schmidt, D. Bullock, V. Deshpande, C. Clifton, A. Elmagarmid, M. Laeley, R. Eberts, J. Pekney, E. Howell, R. Rardin, and J. Schneider). 2003-04. An assessment of highway roughness, Washington State Department of Transportation, 2000-03. Evaluation of variable message signs and in-vehicle systems, Federal Highway Administration and National Highway Transportation Safety Administration, (with W. Barfield 1993-96, sole principal investigator 1996-2002). 1993-2002. Analysis of roadside accident severity and roadside safety management, Washington State Department of Transportation, 1998-99.	Gkritza, K., Niemeier, D., Mannering, F. L., 2006. "Airport security screening and passenger satisfaction: An exploratory assessment". Journal of Air Transport Management 12(5), 213-219. Islam, S., Mannering, F.L., 2006. Driver aging and its effect on male and female single-vehicle accident injuries: Some additional evidence. Journal of Safety Research 37(3), 267-276. Winston, C., Maheshri, V., Mannering, F. L., 2006. "An exploration of the offset hypothesis using disaggregate data: The case of airbags and antilock brakes". Journal of Risk and Uncertainty 32(2), 83-99. Shafizadeh, K., Mannering, F. L., 2006. "Statistical modeling of user perceptions of infrastructure condition: An application to the case of highway roughness". Journal of Transportation Engineering 132(2), 133-140. Khorashadi, A., Niemeier, D., Shankar, V., Mannering, F. L., 2005. "Differences in rural and urban driver-injury severities in accidents involving large trucks: An exploratory analysis". Accident Analysis and Prevention 37(5), 910-921. Mannering, F. L., Kilareski, W., Washburn, S., 2005. "Principles of highway engineering and traffic analysis", John Wiley & Sons, New York, NY. Third edition, 384 pages. Choocharukul, K., Sinha, K. C., Mannering, F. L., 2004. "User perceptions and engineering definitions of highway level of service: An exploratory statistical comparison". Transportation Research Part A 38(9-10), 677-689. Boyle, L., Mannering, F.L., 2004. Impact of traveler advisory systems on driving speed: Some new evidence. Transportation Research Part C 12(1), 57-72.
Federal Highway Administration & Indiana Department of Transportation, "Critical Route Network for Earthquake Response and Dynamic Routes Analysis", PI, 2005-2006. NASA, "A Robust, Scalable Transportation System Concept", DeLaurentis, D, PI, 2005. NSF, "Stochastic Sensing Control Models for Safe and Efficient Traffic Signal Strategies", PI; Bullock, D., Co-PI, 2005-2008. Federal Highway Administration & Indiana Department of Transportation, "Primary Emergency Route for Transportation Security", PI, 2003-2006. Federal Highway Administration & Indiana Department of Transportation, "Minimizing Truck/Car Conflicts on Highways, Phase II", PI, 2002-2004.	Peeta, S. and Zhou, C. (2006). "Stochastic Quasi-gradient Algorithm for Stochastic Dynamic Traffic Assignment," Transportation Research, 40B, No. 3, pp. 179-206. Peeta, S. and Yu, J.W. "On Behavior-based Consistency-Seeking Models as Alternatives to Dynamic Traffic Assignment Models for Real-time Deployment," Transportation Research, Part C, (accepted for publication). Peeta, S. and Ramos, J.L. "Driver Response to Variable Message Signs-Based Traffic Information," IEE Proceedings Intelligent Transportation Systems, (accepted for publication). Peeta, S., Zhang, P. and Zhou, W. (2005). "Behavior-based Analysis of Freeway Car-truck Interactions and Related Mitigation Strategies," Transportation Research, 39B, No. 5, pp. 417-451. Peeta, S. and Yu, J.W. (2005). "A Hybrid Model for Driver Route Choices Incorporating En-Route Attributes and Real-Time Information Effects," Networks and Spatial Economics, Vol. 5, No. 1, pp. 21-40. Zhang, P., Peeta, S., and Friesz, T. (2005). "Dynamic Game Theoretic Model of Multi-Layer Infrastructure Networks," Networks and Spatial Economics, Vol. 5, No. 2, pp. 147-178.
Z. Li and K. C. Sinha, "Methodology for the Development of a Highway Asset Management System for Indiana," FHWA/IN/JTRP-2003/21, Joint Transportation Research Program, School of Civil Engineering, Purdue University, January 2004. K. C. Sinha, B. McCullouch, J. D. Fricker, D. Bullock, S. Konduri and S. Labi, "An Evaluation of INDOT Hyperfix Project," FHWA/IN/JTRP-2004/02, Joint Transportation Research Program, School of Civil Engineering, Purdue University, April 2004. C. Bordat, B. McCullouch and K. C. Sinha, "An Analysis of Cost Overrun and Time Delay of INDOT Projects," FHWA/IN/JTRP-2004/7, Joint Transportation Research Program, School of Civil Engineering, Purdue University, July 2004. K. Choocharukul and K. C. Sinha, "An Analysis of Traveler Perceptions of Freeway Traffic Quality, "FHWA/IN/JTRP-2003/15, Joint Transportation Research Program, School of Civil Engineering, Purdue University, August 2003. T. Giraud, V. Chovichien, S. Labi and K. C. Sinha, "The Development of a Highway Tort Liability Management System for the Indiana Department of Transportation," FHWA/IN/JTRP-2003/20, Joint Transportation Research Program, School of Civil Engineering, Purdue University, September 2003.	S. Labi, M. Rodriguez, and K. C. Sinha, "Assessing Preservation Needs for a Bridge Network - A Comparison of Alternative Approaches," Journal of Structure and Infrastructure Engineering Maintenance, Management, Life-Cycle Design and Performance, Taylor and Francis, UK (accepted for publication). S. Labi, G. Lamptey, and K. C. Sinha, "Effectiveness of Micro-surfacing Treatments," ASCE Journal of Transportation Engineering (accepted for publication). P. Singh, S. Labi, and K. C. Sinha, "Cost-Effectiveness of Warranty Projects in Indiana," ASCE Journal of Transportation Engineering (accepted for publication). G. Lamptey, S. Labi, and K. C. Sinha, "Investigating the Sensitivity of Optimal Network Safety Needs to Key Safety Management Inputs," Transportation Research Record, National Research Council (accepted for publication). G. Lamptey, S. Labi, and K. C. Sinha, "Analysis of Long-Term Effectiveness of Thin Hot-Mix Asphaltic Concrete Overlay Treatments," Transportation Research Record, National Research Council (accepted for publication). S. Labi and K. C. Sinha, "Life-Cycle Evaluation of Flexible Pavement Preventive Maintenance," ASCE Journal of Transportation Engineering, Vol. 131, No. 10, 744-751, October 2005.
8/04-9/06, Federal Highway Administration/INDOT, "Effective and Robust Coordination of Traffic Signals on Arterial Streets", A. Tarko (PI). 8/04-12/06, Federal Highway Administration/INDOT, "Risk Assessment of Various Median Treatments of Rural Interstates", A. Tarko (PI). 7/04-10/06, Federal Highway Administration/INDOT, "Expert System to Support Site Investigation for Safety Improvement", A. Tarko (PI). 7/04-10/05, Federal Highway Administration/INDOT, "Implementation of the Guidelines for Roadway Safety Improvements in Indiana", A. Tarko (PI). 8/03-5/05, Federal Highway Administration/INDOT, "Safety-Conscious Planning in Indiana", A. Tarko (PI). 9/02-8/04, Federal Highway Administration/INDOT, "Predicting Traffic Conditions at Indiana Signalized Intersections", A. Tarko (PI).	Songchitruksa, P. and A. P. Tarko (2006). "The Extreme Value Theory Approach to Safety Estimation", Accident Analysis and Prevention, accepted for publication. Figueroa, A. and A.P. Tarko (2005). "Speed Factors on Two-Lane Rural Highways in Free-Flow Conditions", Transportation Research Record, Journal of the Transportation Research Board, No. 1912, pp. 39-46. Savolainen, P. and A.P. Tarko (2005). "Safety Impacts at Intersections on Curved Segments", Transportation Research Record, Journal of the Transportation Research Board, No. 1908, pp. 130-140. Tarko, A.P. and R. Perez-Cartagena (2005). "Variability of Peak Hour Factor at Intersections", Transportation Research Record, Journal of the Transportation Research Board, No. 1920, pp. 125-130. Perez-Cartagena, R. and A.P. Tarko (2005). "Calibration of Capacity Parameters for Signalized Intersections in Indiana", ASCE Journal of Transportation Engineering, pp. 904-911. Tarko, A. P. and M. Kanodia (2004). "Effective and Fair Identification of Hazardous Locations", Transportation Research Record, Journal of the Transportation Research Board, No. 1897, pp. 64-70.