Faculty Directory

• Pavement design and analysis
• Advanced soil mechanics
• Computational geomechanics, including pavement mechanics
• Civil infrastructure systems

ENCE 201: Engineering Information Processing. Theory and implementation of algorithms for solving problems in several important areas of engineering computation: function approximation; roots of nonlinear functions; solution of simultaneous linear equations; curve fitting (regression and interpolation); numerical differentiation and integration; and solutions of ordinary differential equations for initial value and boundary value problems. Numerical techniques are presented in the context of civil engineering applications. Issues of solution accuracy, robustness, and efficiency are emphasized. Algorithms implementation is primarily via MATLAB programming and secondarily via spreadsheets. (Converted to a blended online format in 2013-2014.)

ENCE 447: Pavement Engineering. Fundamental principles underlying the design, construction, maintenance and repair, and management of highway and airfield pavement systems. Pavement performance (functional/structural; evaluation); pavement mechanics (multi-layered elastic theory; slab theory); pavement materials (properties and characterization); environmental effects; current rigid and flexible design methods (new/rehabilitation); construction (new construction; maintenance/repair; rehabilitation); economic evaluation; pavement management. 

ENCE 640: Advanced Soil Mechanics. Effective stress principle; elasticity theory for stresses and displacements; soil-structure interaction concepts and analysis; classical settlement (consolidation) and compressibility theories, including finite difference solutions for vertical and radial drainage; Mohr-Coulomb strength theory. Emphasis on problem idealization, identification of key variables, methods for estimating needed but unknown problem data (e.g., soil properties), sources of error, and sensitivity analysis. 

ENCE 740 Computational Geomechanics. The application of computational mechanics, and in particular the finite element method, on the solution of stress and flow problems in geomechanics. Review of theoretical formulation of the finite element method, with particular emphasis on the special features most useful in geomechanics. Thorough treatment of the issues involved in performing robust practical analyses of real-world problems. Course term project enables students to apply these techniques to a geomechanics problem of their choosing.

Selected Recent Publications (since 2010):

• Alam-Khan, S., Cetin, B., Forman, B.A., Kutay, M.E., Durham, S., and Schwartz, C.W. “Evaluation of Shortwave and Longwave Radiation Models in Flexible Pavement Analysis.” International Journal of Pavement Engineering. Published online 3/9/2021. DOI: 10.1080/10298436.2021.1895155
• Gopisetti, L. S. P., Cetin, B., Forman, B.A., Durham, S.A., Schwartz, C.W., and Ceylan, H. (2021). “Evaluation of Four Different Climate Sources on Pavement Mechanistic-Empirical Design and Impact of Surface Shortwave Radiation.“ International Journal of Pavement Engineering. Vol 22, Issue 9, pp. 1155-1168. DOI: 10.1080/10298436.2019.1665180
• Haider, I., Schwartz, C.W., and Khosravifar, S. (2019). “Expedited Testing Program for Performance Characterization of Asphalt Mixtures.” Transportation Research Record: Journal of the Transportation Research Board, Vol. 2673, No. 12, pp. 225-233. DOI: 10.1177/0361198119857033
• Hall, K.D. and Schwartz, C.W. (2018). “Development of Structural Design Guidelines for Porous Asphalt Pavement.” Transportation Research Record: Journal of the Transportation Research Board. Volume 2672, No. 40, December, pp. 197–206.
• Goulias, D., Karimi, S., and Schwartz, C. (2018). “Assessing Specification Pay Schedules through Monte Carlo Simulation.” International Journal of Computational Engineering Research. Vol. 8, No. 10, October, pp. 57-65.
• Liu, X., Cui, Q., and Schwartz, C.W. (2018). “Introduction of Mechanistic-Empirical Pavement Design into Pavement Carbon Footprint Analysis.” International Journal of Pavement Engineering. Volume 19, Issue 9, September, pp. 763-771.
• Bowers, B.F., Diefenderfer, B.K., and Schwartz, C.W. (2018). “Assessment of Permanent Deformation Properties of In-Place Recycled Pavement Mixtures.” Journal of the Association of Asphalt Paving Technologists. Volume 87, pp. 241-263.
• Cetin, B., Forman, B.A., Schwartz, C.W., Ruppelt, B. (2018). “Performance of Different Climate Data Sources in Mechanistic-Empirical Pavement Distress Analyses.” ASCE Journal of Transportation Engineering, Part B: Pavements. Vol. 144, No. 1, March. https://doi-org.proxy-um.researchport.umd.edu/10.1061/JPEODX.0000019
• Douglas, E.M., Jacobs, J., Hayhoe, K., Silka, L., Daniel, J., Collins, M., Alipour, A., Anderson, B., Hebson, C., Mecray, E., Mallick, R., Zou, Q., Kirshen, P., Miller, H., Kartez, K., Friess, l., Stoner, A., Bell, E., Schwartz, C., Thomas, N., Miller, S., Audet, B., Wake, C. (2017). “Progress and Challenges in Incorporating Climate Change Information into Transportation Research and Design.” ASCE Journal of Infrastructure Systems, Vol. 23, No. 4. DOI: 10.1061/(ASCE)IS.1943-555X.0000377.
• Diefenderfer, B.K., Bowers, B.F., Schwartz, C.W., Farzaneh, A. and Zhang, Z. (2016). “Dynamic Modulus of Recycled Pavement Mixtures.” Transportation Research Record: Journal of the Transportation Research Board, No. 2575. DOI 10.3141/2575-03.
• Schwartz, C.W., Bowers, B.F., and Diefenderfer, B.K. (2016). “Structural Properties of Asphalt Stabilized Cold Recycled Mixtures.” ISAP 2016 Symposium, Jackson Hole WY, July.
• Schwartz, C.W., Christopher, B. and Tutumluer, E. (2016). “Geotechnical Aspects of Pavements.” GeoStrata, May/June, pp. 44-50.
• Diefenderfer, B.K., Bowers, B.F., and Schwartz, C.W. (2016). “Part of the Process: Checking in on Performance of Recycled Pavements” Roads and Bridges Magazine, February.
• Schwartz, C.W., Forman, B.A., and Leininger, C.W. (2015). “Alternative Sources of Climate Data for Mechanistic-Empirical Pavement Performance Prediction.” Transportation Research Record: Journal of the Transportation Research Board, No. 2524, pp. 83–91 (10.3141/2524-08)
• Khosravifar, S., Afsharikia, Z., and Schwartz, C.W. (2015). “Evaluation of Resilient Modulus Prediction Models for Cohesive and Non-Cohesive Soils.” ASCE Airfield and Highway Pavement Conference, Miami FL, June, pp. 778-788.
• Karimi, S.S., Goulias, D.G., and Schwartz, C.W. (2015). “Effects of Bonus Provisions on HMA Superpave Mixture Specifications Through Pay Factor Analysis,” 6th International Conference on Bituminous Mixtures and Pavements, Thessaloniki, Greece, June, pp. 801–805.
• Khosravifar, S., Haider, I. Afsharikia, A., and Schwartz, C.W. (2015). “Application of Time-Temperature Superposition to Develop Master Curves of Cumulative Plastic Strain.” International Journal of Pavement Engineering, Vol. 16, No. 3, April, pp. 214-223. (DOI: 10.1080/10298436.2014.937810)
• Bassani, M., Khosravifar, S., Goulias, D.G., and Schwartz, C.W. (2015). “Long-Term Resilient and Permanent Deformation Behavior of Controlled Low-Strength Materials for Pavement Applications.” Transportation Geotechnics, Vol. 2, March, pp. 108-118.
• Karimi, S.S., Goulias, D.G., and Schwartz, C.W. (2015). “Risk and Expected Pay Factor Analysis for Assessing Gap and Dense Graded Superpave Mixture Specifications.” International Journal of Pavement Engineering, Vol. 16, No. 1, January, pp. 69-79. 
• Khosravifar, S., Schwartz, C.W., and Goulias, D.G. (2015). “Mechanistic Structural Properties of Foamed Asphalt Stabilized Base Materials.” International Journal of Pavement Engineering. Vol. 16, No. 1, January, p. 27-38.
• Khosravifar, S., Farzenah, A., Haider, I., and Schwartz, C.W. (2015). “Advantages of Non-Symmetric Sigmoidal Function in Construction of Dynamic Modulus Master Curves of Asphalt Mixtures.” Annual Meetings of the Transportation Research Board, Washington DC, January, Paper 15-5615.
• Ceylan, H., Kim, S., Gopalakrishnan, K, Schwartz, C.W., Li, R. (2014). “Sensitivity Analysis Frameworks for Mechanistic-Empirical Pavement Design of Continuously Reinforced Concrete Pavements.” Construction and Building Materials, Vol. 73, December, pp. 498-508.
• Liu, X., Cui, Q., and Schwartz, C. (2014). “Performance Benchmark of Greenhouse Gas Emissions from Asphalt Pavement in the United States.” Creating Infrastructure for a Sustainable World, International Conference on Sustainable Infrastructure 2014, ASCE, Long Beach CA, November, pp. 678-689.
• Schwartz, C.W., Forman, B.A., and Li, R. (2014). “Climate Data for Mechanistic-Empirical Pavement Design.” 12th International Conference on Asphalt Pavements, Raleigh NC, June.
• Liu, X., Cui, Q., and Schwartz, C.W. (2014). “Greenhouse Gas Emissions of Alternative Pavement Designs: Framework Development and Illustrative Application.” Journal of Environmental Management, Vol. 132, January, pp. 313-322.
• Ceylan, H., Kim, S., Gopalakrishnan, K., Schwartz, C.W., and Li, Rui (2013). “Sensitivity Quantification of Jointed Plain Concrete Pavement Mechanistic-Empirical Performance Predictions.” Construction and Building Materials, Vol. 43, June, pp. 545-556.
• Khosravifar, S., Schwartz, C.W., and Goulias, D.G. (2013). “Time-Dependent Stiffness Increase of Foamed Asphalt Stabilized Base Material.” 9th International Conference on the Bearing Capacity of Roads, Railways, and Airfields, Trondheim, Norway, June, pp. 939-948.
• Carvalho, R.L and Schwartz, C.W. (2013). “The Importance of Simulating Moving Wheel Loads in the Mechanistic Analysis of Permanent Deformations in Flexible Pavements.” ASCE Airfield and Highway Pavements Conference, Los Angeles, CA, June, pp. 1156-1166.
• Khosravifar, S., Schwartz, C.W., and Goulias, D.G. (2013). “Foamed Asphalt Stabilized Base: A Case Study.” ASCE Airfield and Highway Pavements Conference, Los Angeles, CA, June, pp. 106-117.
• Li, R., Schwartz, C.W., and Forman, B. (2013). “Sensitivity of Predicted Pavement Performance to Climate Characteristics.” ASCE Airfield and Highway Pavements Conference, Los Angeles, CA, June, pp. 760-771.
• Khosravifar, S., Asefzadeh, A., and Schwartz, C.W. (2013). “Increase of Resilient Modulus of Unsaturated Granular Materials During Drying after Compaction.” GeoCongress 2013: Stability and Performance of Slopes and Embankments III, ASCE, San Diego CA, February, pp. 434-443.
• Schwartz, C.W., Li, R., Ceylan, H., Gopalakrishnan, K., Kim, S. (2013). “Global Sensitivity Analysis of Mechanistic-Empirical Performance Predictions for Flexible Pavements.” Transportation Research Record: Journal of the Transportation Research Board, No. 2368, pp. 12-23.
• Ceylan, H., Gopalakrishnan, K., Kim, S., Schwartz, C.W., and Li, R. (2013). “Global Sensitivity Analysis of Jointed Plain Concrete Pavement Mechanistic-Empirical Performance Predictions.” Transportation Research Record: Journal of the Transportation Research Board, No. 2367, pp. 113-122.
• Ceylan, H., Kim, S., Schwartz, C.W., Li, R., and Gopalkrishnan, K. (2012). “Effect of PCC Material Properties on MEPDG Rigid Pavement Performance.” !0th International Conference on Concrete Pavements, Quebec, July.
• Khosravifar, S., Goulias, D.G., and Schwartz, C.W. (2012). “Laboratory Evaluation of Foamed Asphalt Base Materials.” GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering, ASCE, Oakland, CA, March, pp. 1592-1601.
• Li, R., Schwartz, C.W., Kim, S. and Ceylan, H. (2012). “Local Sensitivity of Mechanistic-Empirical Flexible Pavement Performance Predictions to Unbound Material Property Inputs.” GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering, ASCE, Oakland, CA, March, pp. 1495-1504.
• Karimi, S., Goulias, D., and Schwartz, C.W. (2012). “Evaluation of Superpave HMA Mixture Properties at the Plant versus Behind the Paver: Statistical Comparison of QC and QA Data.” Journal of Transportation Engineering, ASCE, Vol. 138, No. 7, July, pp. 924-932.
• Schwartz, C.W., Li, R., Ceylan, H., Kim, S., and Gopalakrishnan, K. (2011). “Effect of Concrete Strength and Stiffness Characterization on Predictions of Mechanistic-Empirical Performance for Rigid Pavements.” Transportation Research Record: Journal of the Transportation Research Board, No. 2226, pp. 41-50.
• Goulias, D., Kim, H., and Schwartz, C.W. (2011). “Evaluation of In-situ Pavement Material Properties and Behavior through Field Instrumentation and Load Testing.” Journal of Transportation Engineering, ASCE, Vol. 137, No. 7, July, pp. 466-473.
• Schwartz, C.W., and Li, R. (2010). “Sensitivity of Predicted Flexible Pavement Performance to Unbound Material Hydraulic Properties.” GeoFlorida 2010: Advances in Analysis, Modeling, and Design, Geotechnical Special Publication 199, ASCE, p. 2672 (doi 10.1061/41095(365)271).
• Fu, C.C., and Schwartz, C.W. (2010). “Cost Allocation Study for Maryland Toll Facilities.” Annual Meetings of the Transportation Research Board, Washington DC, January, Paper No. 10-2677, 15 p.

Selected Recent Presentations (since 2010):

• "Using Lightweight Deflectomers for Compaction Control.” Arizona Pavement/Materials Conference (virtual), October 2020.
• “Structural Characteristics and Environmental Benefits of Cold-Recycled Asphalt Paving Materials.” 33rd Rhode Island Transportation Forum (virtual), October 2020.
• “Innovation: The Key to the Highway Infrastructure of Tomorrow.” COTA International Conference of Transportation Professionals, Nanjing, China, July, 2019; also Tsinghua University Seminar, Beijing, China, July, 2019.
• “Industry, Agency, and University Collaboration.” 57th Maryland Asphalt Association – Maryland State Highway Administration Asphalt Paving Conference, Baltimore, March 2019.
• "Preparing Future Bechtel Colleagues.” Panel Discussion, Bechtel Global Business Meeting Building on the Past; Designing our Future, San Diego, CA, March 2019.
• “Parametric Study of Soil Drying in the Field for Compaction Quality Assurance using Lightweight Deflectometer.” Annual Meetings of the Transportation Research Board, Washington DC, January 2019, Paper No. 19-01578 (w/ Z. Afsharikia).
• “Stiffness-Based Compaction Quality Assurance Testing Using Lightweight Deflectometers.” University of Pittsburgh, November 2018.
• “Structural Design of Porous Asphalt Pavements.” TRB Webinar, July 2018. (w/ Kevin Hall; estimated 269 sites, 334 attendees) 
• “Pavement Structural Design” and “Standardizing Lightweight Deflectometer Modulus Measurements For Compaction Quality Assurance” Workshop on Mechanistic-Empirical Pavement Design and Construction. Monterrey, Mexico, June 12-13, 2018 (keynote addresses).
• “Zen and the Art of Engineering Education.” Montana State University, April 2018.
• “Cold Recycled and Reclaimed Asphalt Concrete Properties for Pavement Design.” TRB Webinar, March 2018. (estimated 261 sites, 364 attendees)
• “Industry, Agency, and University Collaboration” 56th Maryland Asphalt Association – Maryland State Highway Administration Asphalt Paving Conference, Baltimore, March 2018.
• “Stiffness-Based Compaction Quality Assurance Testing Using Lightweight Deflectometers.” Warren Lecture, University of Minnesota. October 2017.
• “Porous Asphalt Pavements—Not Just for Parking Lots Anymore!” Virginia Asphalt Association 2017 Fall Asphalt Conference, Richmond VA, October 2017.
• “Sensitivity Analysis of Coefficients of Rut Transfer Function of MEPDG in AASHTOWare Pavement ME Software.” ASCE T&DI International Conference on Highway Pavements and Airfield Technology, Philadelphia PA, August 2017 (with I. Haider).
• “Soils and Aggregates: The Foundations of Pavement Performance.” ASCE T&DI International Conference on Highway Pavements and Airfield Technology, Philadelphia PA, August 2017.
• “New Pavement Engineering Technologies – The Long Term Pavement Performance Climate and Bind Tools.” TRB Webinar, August 2017 (with L. Wizer, R. Ahmad).
• “MERRA Data to Support Pavement Performance Prediction.” NASA Goddard MERRA-2 Applications Workshop, Greenbelt MD, June 2017 (with B. Forman).
• “Infrared Asphalt Repair.” County Engineers Association of Maryland Spring 2017 Conference, College Park MD, May 2017 (with M. Mussog).
• “Some Thoughts on Improving Pavement Research Implementation.” Skok Distinguished Lecture, NRRA Pavements Conference 2017, St. Paul MN, May 2017.
• Afsharikia, Z., Khosravifar, S. and Schwartz, C.W. “Compaction Quality Control Target Modulus Determination Using Light-Weight Deflectometer Drops on Proctor Mold.” Paper No. 17-06047, Annual Meetings of the Transportation Research Board, Washington DC, January 2017.
• Bowers, B.F., Diefenderfer, B.K, and Schwartz, C.W. “Permanent Deformation Properties of In-Place Recycled Pavement Mixtures.” Paper No. 17-03642, Annual Meetings of the Transportation Research Board, Washington DC, January 2017.
• “Development of Structural Design Guidelines for Porous Asphalt Pavements,” TRB Committee AFD60 - Flexible Pavement Design, Annual Meetings of the Transportation Research Board, Washington DC, January 2017 (with K. Hall)
• “Soils and Aggregates: The Foundations of Pavement Performance,” Workshop on Unbound Aggregate Layer Characterization for Pavement Design and Performance, Annual Meetings of the Transportation Research Board, Washington DC, January 2017.
• “Structural Characteristics and Environmental Benefits of Cold-Recycled Asphalt Paving Materials,” International and Western State In-Place Recycling Conference, Denver CO, October 2016.
• “Structural Characteristics and Environmental Benefits of Cold-Recycled Asphalt Paving Materials,” National Pavement Preservation Conference, Nashville TN, October 2016.
• “Soils and Aggregates: The Foundations of Pavement Performance.” Special Lecture, 3rd International Conference on Transportation Geotechnics, Guimaraes, Portugal, September 2016.
• “Theme 5: Mechanistic-Empirical Design (Roads, Railways and Airfields).” Theme 5 Overview, 3rd International Conference on Transportation Geotechnics, Guimaraes, Portugal, September 2016.
• “Structural and Environmental Benefits of Cold In-Place Recycled Pavement Materials.” Snead Distinguished Lecture, Texas A&M University, College Station TX, April 2016.
• “Industry, Agency, University: The Role of Research.” 54th Annual MAA-SHA Paving Conference, Baltimore MD, March 2016.
• “Earth Compaction Compaction Quality Assurance Testing Using Lightweight Deflectometers.” Invited Seminar, Ohio State University, Columbus OH, February 2016.
• “Structural and Environmental Benefits of Cold In-Place Recycled Pavement Materials.” Workshop on Use of Byproduct Fines and Recycled Materials for Sustainable Construction of Transportation Infrastructure, Annual Meetings of the Transportation Research Board, Washington DC, January 2016.
• “Structural Properties and Predicted Performance of Cold In-Place Recycled Materials.” Workshop on Ensuring Long-Term Performance of Cold Recycled Mixtures, Annual Meetings of the Transportation Research Board, Washington DC, January 2016.
• “Sustainability of Foamed Stabilized Base (FSB) Processes,” Pavement Preservation and Recycling Alliance (PPRA) 2015 Fall Meeting, Niagara Falls, ON, October 2015.
• “Use of Lightweight Deflectometers for Compaction Control and Verification of Design Intent.” ASCE Airfield and Highway Pavement Conference, Miami FL, June, 2015. (with S. Khosravifar, and Z. Afsharikia)
• “Structural Characteristics and Environmental Benefits of Cold Recycled Asphalt Paving Materials.” Paul Kent Distinguished Lecture, University of Illinois, Urbana-Champaign, IL. April 2015.
• "Climate Aspects of Mechanistic-Empirical Pavement Performance Prediction.” Workshop on Pavement Structures Behaviour and Deterioration in Cold Climate with Seasonal Variations, KTH (Royal Swedish Technical Institute), Stockholm, Sweden. April 2015.
• “Bituminous CIR and FDR Properties for Mechanistic-Empirical Pavement Design.” Pavement Preservation and Recycling Summit (PPRS 2015), Paris, France. February 2015.
• “Quality Assurance of Earthwork Compaction.” Workshop on Advances in Quality Control and Quality Assurance in Road Constructions, Polytecnico di Torino, Italy. March 2015 (keynote address).
• “NCHRP 9-51: Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete for Pavement Design.” Workshop on Recent Advances in Mechanistic Evaluation of Flexible Pavements, Annual Meetings of the Transportation Research Board, Washington DC, January, 2015 (with B.K. Diefenderfer and B.F. Bowers).
• “Infrared Asphalt Repair—A Better Option for You.” Lunch and Learn Seminar, Pavement Corporation, National Harbor, Washington DC, July 17, 2014.
• “Evaluation of MERRA Climatic Data for Use in MEDPG Calibration and Other Pavement Analyses.” TRB Expert Task Group on LTPP Special Activities, National Academy of Sciences, Washington DC, May 2014.
• “Climate Data for Pavement Design.” NSF Infrastructure and Climate Network (ICNet) Workshop, Portsmouth NH, April 2014.
• “Industry, Agency, University: The Role of Research.” MAA-SHA 52nd Annual Paving Conference, Baltimore MD, March 2014.
• “Application of Time-Temperature Superposition Principal in Prediction of Cumulative Plastic Strain in Repeated Load Permanent Deformation Tests.” Annual Meetings of the Transportation Research Board, January 2014 (w/ S. Khosravifar and S.I. Haider).
• “Standardizing Lightweight Deflectometer (LWD) Modulus Measurements for Compaction Quality Assurance.” FWD User Group Meeting, Baltimore, MD, October 2013.
• “FASB Material Properties for Pavement Structural Design.” Recycled Materials Task Force Meeting, Maryland State Highway Administration, Hanover, MD, April 2013.
• “NCHRP 09-51: Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete for Pavement Design.” Mid-Atlantic Quality Assurance Workshop, Williamsburg, VA, February, 2013.
• "Mechanistic Structural Properties of Foamed Asphalt Stabilized Base Materials." Annual Metings of the Transportation Research Board, January 2013 (w/ S. Khosravifar and D.G. Goulias).
• “Improved Climate Data for LTPP, MEPDG, and Other Infrastructure Applications.” Annual Meetings of the Transportation Research Board, Washington DC, January 2013.
• “Implementing ‘Exotic’ Models into the MEPDG.” Annual Meetings of the Transportation Research Board, Washington DC, January 2013.
• “NCHRP Project 09-51: Update.” Annual Meetings of the Transportation Research Board, Washington DC, January 2013.
• “Basics of Asphalt Modeling: Part 2.” Transportation Research Board Webinar, December 11, 2012. (130+ attendees)
• “NCHRP 09-51: Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete for Pavement Design.” Northeast State Materials Engineers Association (NESMEA) Annual Meeting, October 24, 2012, Philadelphia, PA.
• “LTPP Climate Analysis Project.” Transportation Research Board Expert Task Group on Long Term Pavement Performance Program Special Projects, October 18, 2012, Washington DC (w/ G. Elkins).
• “User’s Experience with AMPT: Maryland.” National PooledFund Workshop on the Asphalt Mixture Performance Tester, Atlanta GA, September 2012.
• “Calibration and Precision of Alternate Rutting Models for the MechanisticEmpirical Pavement Design Guide.” Transportation Research Board Webinar, August 30, 2012. (110+ attendees)
• “Sensitivity Evaluation of the MEPDG for Flexible Pavements.” Transportation Research Board Webinar, July 25, 2012. (330+ attendees)
• “Sensitivity Evaluation of MechanisticEmpirical Pavement Design.” AASHTO Joint Technical Committee on Pavements Annual Meeting, Louisville KY, May 2012.
• “UMD, SHA, and MAA Relationship.” 50th Annual Maryland Asphalt Association Paving Conference, Baltimore MD, March 2012.
• “Sensitivity Evaluation of MEPDG Flexible Pavement Performance Predictions.” TRB Committee AFD60 Flexible Pavement Design, Washington DC, January, 2012.
• “Permanent Deformation Prediction: What Are the Issues?” Permanent Deformation Modeling Workshop, North Carolina State University, Raleigh, NC, June 2011.
• “The Intersection of Pavement Design and Materials.” 49th Annual Maryland Asphalt Pavement Conference, Baltimore MD, March 2011.
• “Applications of RFID Technology to Asphalt Paving.” 2nd International Conference on Transportation Construction Management, Orlando FL, February 2011 (w/ E. Mustafa, G. Pfeiffer, and J. Khan).
• “Field Evaluation of Foamed Asphalt Stabilized Base Layers.” Pavement Evaluation 2010, Roanoke VA, October 2010 (w/ S. Khosravifar and D. Goulias).
• “Viscoplasticity: Modeling of Asphalt Rutting.” TRB Webinar, Applications of Advanced Models to Characterize Asphalt Pavements, October 2010. 
• “Escaped from the Laboratory: Some Research Trends for the Hot Mix Industry.” 48th Annual Maryland Asphalt Paving Conference, Baltimore MD, March 2010.
• “Rutting Predictions for FHWA Accelerated Load Facility.” Workshop on Mechanistic Modeling and Prediction of Permanent Deformations in Asphalt Pavements, Annual Meetings of the Transportation Research Board, Washington DC, January 2010 (with N.H. Gibson, M.E. Kutay, and R.L. Carvalho).