Profilograph Correlation Study with Present Serviceability Index (PSI). Demonstration Project No. 72. Automated Pavement Data Collection Equipment

摘要

The report provides correlations between Present Serviceability Index (PSI), as obtained from the Surface Dynamics Profilometer (SDP), and Profile Index (PI) from the California and Rainhart Profilographs. Two tenths mile sections in three areas of Texas new and old rigid pavements were measured with these devices for the study. In addition to the correlations with PSI, correlations are also provided between each profilograph with one another and between roughness data from the Walker Roughness Device (WRD). A mathematical model of the two profilographs is provided and the measuring capability of the two profilographs to various road profile frequencies or wavelength components is illustrated. Power Spectral estimates of the road profile for the various PSI classes are also presented.