Highway and pavement design plays an important role in the DPR projects. The satisfactory performance of the pavement will result in higher savings in terms of vehicle operating costs and travel time, which has a bearing on the overall economic feasibility of the project. A thorough analysis of the existing pavement is greatly required at this point of time, as an excessive amount of vehicle loads is passing through the project site and it is unknown whether or not the road pavement might sustain its structural integrity. The critical line of equal costs on the plane of CBR versus msa is also identified. This is a swing line which delineates the economic feasibility of two types of pavements. It has been found that the pressure vs settlement curve; pressure vs nodal stress curve ; pressure vs element stress curve are linear for small pressure range and then it become nonlinear. More nonlinearity is seen at higher pressure. Hence material nonlinearity must be considered while analysing and designing flexible pavements. This total work includes collection of data analysis various flexible and rigid pavement designs and their estimation procedure are very much useful to engineer who deals with highways.

SK.NAYEEM,G.VISWANADH."Design and Analysis of Flexible Pavement by Nonlinear Finite Element Method". International Journal of Computer Engineering In Research Trends (IJCERT) ,ISSN:2349-7084 ,Vol.2, Issue 12,pp.971-976, December- 2015, URL :https://ijcert.org/ems/ijcert_papers/V2I1229.pdf,

[1] Analysis and design of flexible pavements, Indian Road Congress, Code 37, 2001 
[2] Bruhaspathi, KVRDN and NarasingaRao, BND. 2012. ―Pavement Design of National Highway A Case Study on Reducing Pavement Thickness‖, International Journal of Engineering Research and Applications, Vol. 2, Issue 4, pp.1000-1003 
[3] Chandra, S. and Sikdar, P.K. 2000. ―Factors Affecting PCU in Mixed Traffic Situations in Urban Roads‖, Road Transport Research, Vol. 9, No. 3, Australian Road Research Board, pp. 40-50. 
[4] Highway Capacity Manual. 2000. Transportation Research Board, Special Report 209, fourth edition, Washington D.C. 
[5] Methods of Test for Soils: Part 9 - Determination of Dry Density-Moisture Content Relation by Constant Mass of Soil Method, Indian standard code 2720.8, 1983.
[6] Methods of Test for Soils: Part 16 – Laboratory Determination of CBR, Indian standard code 2720.16,1987. 
[7] A report on flexible pavement design, Public works department, Government of Kerala, 2012. 
[8] Rafiqul A. Tarefder, NayanSaha, Jerome W. Hall, and Percy, T. 2008. ―Evaluating weak subgrade for pavement design and performance prediction‖. Journal of Geo-Engineering, Vol. 3, No. 1. 
[9] Sarna, A.C., Jain, P.K. and Chandra, G. 1989. ―Capacity of Urban Roads - A Case Study of Delhi and Bombay‖. Highway Research Bulletin, No. 4, Indian Roads Congress, New Delhi. 
[10] Saurabh Jain, Joshi, Y.P. and Goliya, S. S. 2013. ―Design of Rigid and Flexible Pavements by Various Methods & Their Cost Analysis of Each Method‖. Int. Journal of Engineering Research and Applications, Vol. 3, Issue 5. 
[11] Yagar, S. and Aerde, M.V. 1983. ―Geometric and Environmental Effects on Speeds of 2-Lane Highways‖, Transportation Research-A, Vol. 17A, No. 4, pp. 315-325. 
[12]. Das, A. (2007) Pavement Design with Central Plant Hot-Mix Recycled Asphalt Mixes, Construction and Building Materials, Vol.21, No.5, pp.928-936. 
[13]. Das, A.(2008) Reliability Considerations of Bituminous Pavement Design by MechanisticEmpirical Approach, the International Journal of Pavement Engineering, Vol.9, No.1, pp. 19-31.
 [14]. Dilip, D., Ravi, P. and Babu,G. (2013) System Reliability Analysis of Flexible Pavements, Journal Transportation Engineering, Vol.139, No.10, pp. 1001- 1009. 
[15]. Hadi, M.N.S. and Bodhinayake, B.C. (2003) Nonlinear Finite Element Analysis of Flexible Pavements, Advances in Engineering Software, Vol.34, No.11-12, pp. 657-662