The Central Artery/Tunnel (CA/T)project, in Boston, Massachusetts, is the largest interstate highway programme in the United States. Estimated at $8 billion, the project will generate more that 50 lane-km of new vehicular tunnels and will accommodate more than 300,000 vehicles per day in design year 2010. A direct result of the planning and design efforts on the CA/T is the Memorial Tunnel Fire Ventilation Test Program. recently completed in a full-size facility in West Virginia. The data from running 98 fires of various size under several ventilation configurations are available on CD-ROM set for major design refinements and improved operational strategies on the CA/T project and other tunnel programmes nationwide.

KEYWORDS: year 1997, Tunnels, underground, roads, USA, ventilation, fire, costs