LTPP Maintenance and Rehabilitation Data Review - Final Report
Primary Topic: Pavement Maintenance
Description: Since its inception, the Long-Term Pavement Performance (LTPP) program has collected maintenance and rehabilitation (M&R) data on all of the test sections included in the LTPP program. To date, there has been no detailed review of the M&R data elements. This report provides a detailed review of the M&R data and presents the findings from that review.
A total of 757 test sections have undergone some type of M&R activity. Of these test sections, only 23 anomalies were found. These anomalies consist primarily of sections that have patching recorded in the M&R tables, but no increase in patching area or number in the distress surveys.
All of the M&R data tables for these 757 test sections were reviewed for data completeness. For most of these test sections, several fields are missing in almost all of the tables. A detailed list of the missing data fields is included as an appendix to the report. Although it might be difficult to obtain these data for the older M&R activities, an attempt should be made to collect the essential data elements, as a minimum.
The distress monitoring data and IRI values were reviewed for those test sections without any known M&R activity. The number of these test sections exceeded 1800. A review of the data from these test sections was completed to identify those sections that may have had some type of M&R treatment, but for which no treatment is recorded in the LTPP database. A total of 275 anomalies of this type was identified. Over 80 percent of these anomalies were found to be a result of an increase in patching from the distress surveys in the absence of any patching record in the M&R tables.
FHWA Publication Number: FHWA-RD-01-019
Publication Year: 2001
Document Links: PDF (file size: 1 mb)