The twelve most critical sites based on volume/service flow ratio (V/SF).

The procedures outlined in the HPMS software for determining highway capacity conforms to the Highway Capacity Manual 2000 (HCM 2000). The capacity calculations are based on service flow rates at level of service E, and are for the peak direction. The capacity coded in HPMS is used for system planning analysis, not project level analysis.

HPMS Data Items Used in V/SF Ratio