This study investigates how the site specific traffic data differs from the Mechanistic Empirical Pavement Design Software default values. Two Weigh-in-Motion (WIM) stations were installed in Interstate-40 (I-40) and Interstate-25 (I-25) to developed site specific data. A computer program named WIM Data Analysis Software (WIMDAS) was developed using Microsoft C-Sharp (.Net) for quality checking and processing of raw WIM data. A complete year data from November 2013 to October 2014 was analyzed using the developed WIM Data Analysis Program. After that, the vehicle class distribution, directional distribution, lane distribution, monthly adjustment factor, hourly distribution, axle load spectra, average number of axle per vehicle, axle spacing, lateral wander distribution, and wheelbase distribution were calculated. Then a comparative study was done between measured data and AASHTOWare default values. It was found that the measured general traffic inputs for I-40 and I-25 significantly differ from the default values., {"references":["Mechanistic-Empirical Pavement Design Guide, Interim Edition: A\nManual of Practice. American Association of State Highway and\nTransportation Officials (AASHTO), Washington, D. C., 2008.","Tarefder, R. and J. I. Rodriguez-Ruiz. WIM Data Quality and its\nInfluence on Predicted Pavement Performance. Transportation Letters:\nThe International Journal of Transportation Research, 5(3), 2013, pp.\n154-163.","Timm, D. H., J. M. Bower, and R. E. Turochy. Effect of Load Spectra\non Mechanistic–Empirical Flexible Pavement Design. In Transportation\nResearch Record: Journal of the Transportation Research Board, No. 1947, Transportation Research Board of the National Academies,\nWashington, D.C., 2006, pp. 146–154.","Tran, N. H., and K. D. Hall. Development and Influence of Statewide\nAxle Load Spectra on Flexible Pavement Performance. In\nTransportation Research Record: Journal of the Transportation\nResearch Board, No. 2037, Transportation Research Board of the\nNational Academies, Washington, D.C., 2007, pp. 106–114.","Tran, N. H., and K. D. Hall. Development and Significance of Statewide\nVolume Adjustment Factors in Mechanistic-Empirical Pavement Design\nGuide. In Transportation Research Record: Journal of the\nTransportation Research Board, No. 2037, Transportation Research\nBoard of the National Academies, Washington, D.C., 2007, pp. 97–105.","Ishak, S., H. C. Shin, B. K. Sridhar, and Z. Zhang. Characterization and\nDevelopment of Truck Axle Load Spectra for Future Implementation of\nPavement Design Practices in Louisiana. In Transportation Research\nRecord: Journal of the Transportation Research Board, No. 2153,\nTransportation Research Board of the National Academies, Washington,\nD.C., 2010, pp. 121–129.","Haider, S. W., R. S. Harichandran, and M. B. Dwaikat. Effect of Axle\nLoad Measurement Errors on Pavement Performance and Design\nReliability. In Transportation Research Record: Journal of the\nTransportation Research Board, No. 2160, Transportation Research\nBoard of the National Academies, Washington, D.C., 2010, pp. 107–\n117.","Romanoschi, S. A., S. Momin, S. Bethu, L. Bendana. Development of\nTraffic Inputs for the new ME Pavement Design Guide: a Case Study.\nJournal of Transportation Engineering, Vol. 2256, 2011, pp. 142–150.","Smith, B. C., and B. K. Diefenderfer. Analysis of Virginia-Specific\nTraffic Data for Use with the Mechanistic-Empirical Pavement Design\nGuide. In Transportation Research Record: Journal of the\nTransportation Research Board, No. 2154, Transportation Research\nBoard of the National Academies, Washington, D.C., 2010, pp. 100–\n107.\n[10] Darter, M., L. Titus-Glover, and D. Wolf. Development of a Traffic\nData Input System in Arizona for the MEPDG. Final Report, Report No.\nFHWA-AZ-13-672, 2013, Arizona Department of Transportation,\nPhoenix, AZ.\n[11] Islam, M. R., R. A. Tarefder, and I. Syed. Measurements of Lateral\nDistribution of Vehicle Wheels and its Effect on Fatigue Life of Asphalt\nConcrete. 3rd International Conference on Transportation\nInfrastructure (ICTI), April 22-25, 2014, Pisa, Italy, pp. 379–383."]}