01552175

Component

Friction data from the Long-Term Pavement Performance Program (LTPP) database were analyzed to examine their quality and potential use. Data from thirty USA states along with Puerto Rico, Ontario, and Saskatchewan were sorted by availability of traffic information, testing temperature, and pavement type. Some testing information was not available in the LTPP database including the tire type used and the wheel path that was tested. Traffic data in the form of Equivalent Single Axle Load (ESAL) are available in the LTPP database but are not for the entire life of the pavement and had to be supplemented with projections. There is evidence of good quality control in Friction Number (FN) measurements. FN difference between beginning and ending of section measurements was found consistent with American Society for Testing and Materials (ASTM) standards. FN distribution from the LTPP database can be used as a pavement management tool to estimate the percentage of sections that need maintenance for friction restoration. There is a great deal of variability in the FN data in spite of correcting for seasonal variations. Many of the selected sections displayed an expected trend but much of the variation in the FN trend occurred at lower values of ESAL indicating factors other than traffic being responsible for the variation. Reasonable trends took both linear and nonlinear forms but appeared nonlinear in general. The variation of FN followed a similar trend with both pavement age and ESAL. Data not available in the LTPP database may limit the potential use and modeling of the existing data.

This paper was sponsored by TRB committee AFD90 Surface Properties - Vehicle Interaction. Alternate title: Potential Use of Friction Data from the LTPP Database in Preliminary Maintenance Decisions for Asphalt and Concrete Pavements.

01550057

15-5255

English

15p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Asphalt pavements; Concrete pavements; Databases; Decision making; Equivalent single axle loads; Friction; Pavement maintenance; Skid resistance; Traffic data; Trend (Statistics)

Long-Term Pavement Performance Program

Data availability; Friction numbers

Ontario (Province); Puerto Rico; Saskatchewan; United States

Data and Information Technology; Highways; Maintenance and Preservation; Pavements; I60: Maintenance

Transportation Research Board Annual Meeting 2015 Paper #15-5255

TRIS, TRB, ATRI

Dec 30 2014 1:46PM