TY - GEN

T1 - A nonlinear model for predicting pavement serviceability

AU - Prozzi, Jorge A.

AU - Madanat, Samer M.

PY - 2002

Y1 - 2002

N2 - A recursive nonlinear model was developed to predict pavement deterioration. Pavement deterioration was assessed in terms of loss of serviceability - expressed as a function of traffic characteristics, pavement structural properties and environmental conditions. The model highlights some of the advantages of relaxing the linear restriction usually placed on the model specification. First, a functional form that better represents the physical deterioration process can be used. Second, the estimated parameters are unbiased because of proper specification and the use of sound estimation techniques. Finally, the standard error of the regression was reduced by half that of the equivalent existing linear model. The model developed enables the determination of an unbiased exponent of the so-called power law, and equivalent loads for different axle configurations. The estimated exponent confirms the value of 4.2 traditionally used. However, equivalent loads estimated for different axle configurations differed from traditionally used values. The estimated equivalent load for a single axle with single wheels is 44 kN, while the equivalent load for a tandem axle with dual wheels is 148 kN.

AB - A recursive nonlinear model was developed to predict pavement deterioration. Pavement deterioration was assessed in terms of loss of serviceability - expressed as a function of traffic characteristics, pavement structural properties and environmental conditions. The model highlights some of the advantages of relaxing the linear restriction usually placed on the model specification. First, a functional form that better represents the physical deterioration process can be used. Second, the estimated parameters are unbiased because of proper specification and the use of sound estimation techniques. Finally, the standard error of the regression was reduced by half that of the equivalent existing linear model. The model developed enables the determination of an unbiased exponent of the so-called power law, and equivalent loads for different axle configurations. The estimated exponent confirms the value of 4.2 traditionally used. However, equivalent loads estimated for different axle configurations differed from traditionally used values. The estimated equivalent load for a single axle with single wheels is 44 kN, while the equivalent load for a tandem axle with dual wheels is 148 kN.

UR - http://www.scopus.com/inward/record.url?scp=0036042374&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036042374&partnerID=8YFLogxK

U2 - 10.1061/40632(245)61

DO - 10.1061/40632(245)61

M3 - Conference contribution

AN - SCOPUS:0036042374

SN - 0784406324

SN - 9780784406328

T3 - Proceedings of the International Conference on Applications of Advanced Technologies in Transportation Engineering

SP - 481

EP - 488

BT - Proceedings of the International Conference on Applications of Advanced Technologies in Transportation Engineering

PB - ASCE - American Society of Civil Engineers

T2 - Proceedings of the seventh International Conference on: Applications of Advanced Technology in Transportation

Y2 - 5 August 2002 through 7 August 2002

ER -