§ 3.4.11. Maintenance Data (Municipal Flexible Pavement Design (MFPS-1) Only)

In the Municipal Flexible Pavement Design (MFPS-1) program, yearly routine maintenance costs are calculated based on a simple linear projection from the initial year of pavement construction. Figure 3-9 in Appendix H of this manual illustrates how this linear relationship can ideally be established from the current (or a recent) year's maintenance expenditures on individual city streets. Since different streets' classes (major arterials, neighborhood collectors, etc.) have different levels of traffic and therefore different levels of maintenance, it is recommended that separate linear maintenance relationships be established for each functional class. Note that in preparing bar charts similar to that in Figure 3-9 in Appendix H of this manual, each bar represents the average maintenance expenditure for a given year on one or more pavement facilities of the same class and with the same age.

A.

First Year Cost of Routine Maintenance

Using a chart similar to that in Figure 3-9 in Appendix H of this manual, this value would be determined by interpolating from the "best fit" linear relationship for the initial routine maintenance cost corresponding to a pavement age of 0.5 year.

B.

Annual Incremental Increase in Maintenance Cost

This variable is represented by the slope of the "best-fit" line shown in Figure 3-9 in Appendix H of this manual. As can be seen, it may have a greater effect on the total routine maintenance cost than the first year cost.