LOS ANGELES – May 11, 2005 – Ampco System Parking, a wholly-owned subsidiary of ABM Industries Incorporated (NYSE:ABM), has been awarded a multi-year, multi-million dollar contract renewal with Will Rogers World Airport in Oklahoma City. The contract covers parking management and shuttle operations for more than 5,000 parking spaces.

“We are pleased to continue managing the parking facilities and shuttle operations for Will Rogers World Airport,” said Thomas Barnett, president of Ampco System Parking. “Our staff remains committed to maintaining the highest standards of quality for the parking needs of passengers and employees at this busy location, which serves the Oklahoma City area and more than three million passengers each year,” he added.

“Ampco has always provided excellent service to the patrons of Will Rogers World Airport,” said Luther E. Trent, director of airports for the Oklahoma City Department of Airports. “We anticipate continued excellence in our parking program and look forward to working with Ampco in the coming years to serve our travelers,” he added.

Will Rogers World Airport was Oklahoma City’s first airport. Created in 1927 for air passenger and airmail service, the facility has evolved into a major business complex with a profound economic impact on Oklahoma City and the rest of the state. Will Rogers World Airport is located on more than 8,000 acres of land and serves seven major airlines, two regional airlines and a growing number of charter services.

Ampco System Parking is an industry leader, operating more than 1,700 lots and garages in 30 states, including parking facilities at or adjacent to such major international airports as Austin, Buffalo, Cincinnati, Denver, Honolulu, Houston, Los Angeles, Omaha, Orlando, Philadelphia and San Francisco.

ABM Industries Incorporated is among the largest facility services contractors listed on the New York Stock Exchange. With fiscal 2004 revenues in excess of $2.4 billion and more than 73,000 employees, ABM provides janitorial, parking, security, engineering, lighting and mechanical services for thousands of commercial, industrial, institutional and retail facilities in hundreds of cities across the United States and British Columbia, Canada. The ABM Family of Services includes ABM Janitorial; Ampco System Parking; ABM Security Services, which includes American Commercial Security Services (ACSS) and Security Services of America (SSA); ABM Facility Services, which includes ABM Engineering and CommAir Mechanical; and Amtech Lighting.