This controls the supersegment creation based on PCI. The tolerance is a range of acceptable PCI values. As the supersegment is created the average supersegment PCI is calculated. The PCI tolerance range is calculated using the following formula.
Supersegment Average PCI + PCI Tolerance AND Supersegment Average PCI - PCI Tolerance.
Each new subsegment's PCI is compared against the supersegment's average PCI. If the subsegment PCI falls outside that range the supersegment is completed and a new supersegment is created.
This helps with a subsegment that is either in really good condition, or really bad condition from being added to a supersegment of subsegments that are in average condition. This helps to keep roads that are going to require the same maintenance grouped together. For example: If the average PCI of the supersegment that is being created is 75 and the PCI Tolerance is 10 a subsegment with a PCI 70 will be included in the supersegment, while a subsegment with a PCI of 60 will cause a new supersegment to be generated.
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