01550540

Component

The Long Term Pavement Performance (LTPP) program collected 140 sets of 5 repeat profile measurements on nine of the remaining 13 Special Pavement Studies (SPS-2) test sections to evaluate the change in daily roughness on the SPS-2 test sections which are plain jointed, doweled pavements with 15 ft joint spacing. Profile measurements were obtained at three intervals during the day ranging in duration between 8 hrs and 14 hrs. The average daily change in roughness (MRI) was 12 in./mi with extremes to 38 in./mi. The design feature which had the greatest impact on daily roughness change was flexural strength. The higher flexural strength produced a 30% higher average daily change. The Permeable Asphalt Treated Base (PATB) provided the best mitigation to daily roughness changes and it appears there may be some benefit to the widened shoulder concept for controlling daily roughness changes.

This paper was sponsored by TRB committee AFD90 Surface Properties - Vehicle Interaction.

01550057

15-2142

English

13p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Daily; Flexural strength; Roughness; Test sections

Long-Term Pavement Performance Program; Specific Pavement Studies (LTPP)

Asphalt treated permeable base; Shoulder width

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

Transportation Research Board Annual Meeting 2015 Paper #15-2142

TRIS, TRB, ATRI

Dec 30 2014 12:46PM