The FHWA (Federal Highway Administration) has approved the use of Rental Rate Blue Book on federally funded projects. The most common application is in force account work and for federally funded projects. FHWA (Federal Highway Administration) has limited their participation in matching funds with state highway agencies (using Rental Rate Blue Book) to the monthly rate divided by 176 (hours/month) plus the hourly operating cost. Additionally, FHWA states that the rates must also be adjusted for age and geographic region. Therefore, the “FHWA” rate in the Blue Book represents monthly ownership rate/176 x Age Adjustments x Regional Adjustments plus hourly operating cost. User defined adjustments are also included in the FHWA rate shown.