Evaluation and calibration of the Mechanistic–Empirical Pavement Design Guide (MEPDG) has been attempted by various agencies throughout the United States. Agencies interested in adopting the MEPDG procedure must prepare a practical implementation plan that fits local conditions. The first step in the implementation plan is collection of design input data and establishment of a database for inputs. A 3-year study was conducted at Arizona State University to establish a database to support MEPDG implementation for the Maricopa County, Arizona, Department of Transportation. The implementation program included testing of asphalt binders, hot-mix asphalt dynamic modulus, and unbound-materials resilient modulus; development of climatic weather stations and training material; and collection of traffic data. The collected information can be used to calibrate the MEPDG distress models to county conditions and verify such models. The input parameters can serve as a framework for similar highway agencies and help ensure the successful implementation of the MEPDG.
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References
1.
Transportation Research Board, National Academies of Science. Mechanistic–Empirical Pavement Design Guide.http://www.trb.org/mepdg. Accessed July 15, 2010.
2.
MamloukM., and ZapataC. E.Pavement Design Research Towards the Implementation of the Mechanistic–Empirical Pavement Design Guide.Maricopa County Department of Transportation, Phoenix, Ariz., 2009.
3.
FredlundD. G., and XingA.Equations for the Soil–Water Characteristic Curve. Canadian Geotechnical Journal, Vol. 31, No. 3, 1994, pp. 521–532.
4.
ZapataC. E., PereraY. Y., and HoustonW. N.Matric Suction Prediction Model in New AASHTO Mechanistic–Empirical Pavement Design Guide. In Transportation Research Record: Journal of the Transportation Research Board, No. 2101, Transportation Research Board of the National Academies, Washington, D.C., 2009, pp. 53–62.
5.
ZapataC. E., AndreiD., WitczakM. W., and HoustonW. N.Incorporation of Environmental Effects in Pavement Design. International Journal of Road Materials and Pavement Design, Vol. 8, No. 4, 2007, pp. 667–693.
6.
ZapataC. E., HoustonS. L., HoustonW. N., and DyeH.Expansion Index and Its Relationship with Other Index Properties. Proc. 4th International Conference on Unsaturated Soils, Carefree, Ariz., ASCE, Reston, Va., 2006, pp. 2133–2137.
7.
WitczakM. W., AndreiD., and HoustonW. N.Resilient Modulus as Function of Soil Moisture: Summary of Predictive Models.Arizona State University, Tempe, 2000.
8.
ZapataC. E.Research Results Digest 347: A National Catalog of Subgrade Soil–Water Characteristic Curves and Selected Soil Properties for Use with the MEPDG.Transportation Research Board of the National Academies, Washington, D.C., 2010.
9.
Keys to Soil Taxonomy, 10th ed.National Resources Conservation Service, U.S. Department of Agriculture, 2006.
10.
SSURGO Metadata Version 2.1.2.National Resources Conservation Service, U.S. Department of Agriculture.
OppenheimerJ. M., and SummerJ. S.Depth to Bedrock Map, Basin and Range Province, Arizona.Laboratory of Geophysics, University of Arizona, Tucson, 1980.
18.
CaryC. E., and ZapataC. E.Resilient Modulus Testing for Unsaturated Unbound Materials. Presented at 89th Annual Meeting of the Transportation Research Board, Washington, D.C., 2010.
19.
CaryC. E.Resilient Modulus Testing for Unsaturated Unbound Materials. MS thesis. Arizona State University, Tempe, 2008.
20.
Research Results Digest No. 285: Laboratory Determination of Resilient Modulus for Flexible Pavement Design.Transportation Research Board of the National Academies, Washington, D.C., 2004.
AndreiD.Development of a Predictive Model for the Resilient Modulus of Unbound Materials. PhD dissertation. Arizona State University, Tempe, 2003.
23.
YauA., and Von QuintusH. L.Study of LTPP Laboratory Resilient Modulus Test Data and Response Characteristics. Final report. FHWA-RD-02-051. FHWA, U.S. Department of Transportation, 2002.
24.
WitczakM. W., HoustonW. N., ZapataC. E., RichterC., LarsonG., and WalshK.Improvement of the Integrated Climatic Model for Moisture Content Predictions. In NCHRP Project 1-37A.Transportation Research Board of the National Academies, Washington, D.C., 2004. http://www.trb.org/mepdg/guide.htm. Accessed June 15, 2010.
25.
ARA, Inc., ERES Consultants Division. Guide for Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures. NCHRP Project l-37A. Final report. Transportation Research Board of the National Academies, 2004. http//www.trb.org/mepdg/guide.htm.
