Audits of local, state and national government fleets reveal weaknesses in controlling personal use of government-owned vehicles, according to AccountingWEB.com. An audit of the City of Denver asserts that the lack of a centralized database and accounting agency for city vehicles makes monitoring the fleet nearly impossible. The City Finance Director has pledged to review the fleet take-home policy but said a centralized fleet management program would not be cost effective, because only about 20 percent of state vehicles are driven by non-security personnel. The State of Wisconsin is liable for $26,100 in back taxes for not treating the personal use of state-owned vehicles as taxable income in 2002 and 2003. As a result of the audit, Wisconsin has banned almost all personal use of state-owned vehicles. An Energy Department audit found 28 percent of the fleet at the Yucca Mountain Project to be underutilized. Managers at Yucca Mountain have since cut more than 25 percent from their fleet. An audit of the Fairfax County, Virginia fleet found that large number of access codes to the county’s fuel sites increased the opportunity to use fuel for personal use. The county has since eliminated many codes and now requires a monthly fuel report from each agency, according to AccountingWEB.com.