caption: This flowchart shows the Pavement Health Track (PHT) remaining service interval (RSI) algorithm. It begins with an oval labeled ``RSI analysis.'' From there, the process flows down to a box labeled ``Select all highway sections that have not yet exceeded the analysis period.'' This next flows to ``Set PHT terminal thresholds to preservation levels.'' Next comes a process, as denoted by the double rectangle, labeled ``Execute PHT analysis.'' Another process, as denoted by the double rectangle, follows and is labeled ``Execute maintenance analysis.'' The flowchart then meets a ``loop'' that has the label ``Repeat for rehabilitation and reconstruction levels'' and returns to the ``Set PHT terminal thresholds to preservation levels.'' After the loop comes ``Reset pavement conditions to post preservation levels. Increment elapsed time by the overall RSL.'' The flowchart then meets a ``loop'' that has the label ``Repeat for rehabilitation and reconstruction levels'' and returns to the ``Reset pavement conditions to post preservation levels. Increment elapsed time by the overall RSL.'' After the loop is a box labeled ``Exit.''
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