Study of LTPP Pavement Temperatures

RECOMENDATION

There are no specific changes in temperature reading or recording protocol that are needed. Most of the errors are simple human errors. If anything, simple checks of reasonableness may help minimize data errors in the future. One method would be to devise a filtering process that would give a graphical view of the IR data, and allow the manual temperature data to be entered and displayed at the same time. Significant errors can be spotted in this way; this procedure is similar to the data screening carried out in this project.

One intra-module check could be added that would guard against having meaningless IR data for subgrade and granular surfaces, if any remain to be tested. The check could be worded as follows:

1. If LANE_NO = S or G, then there should be no corresponding MON_DEFL_TEMP_DEPTHS and MON_DEFL_TEMP_VALUES records, and the PVMT_SURF_TEMP field in MON_DEFL_LOC_INFO should be null.