from Oakland as well as replacing Ashby for traffic coming from San Francisco. Ashby Avenue and Tunnel Road were redesignated State Highway 13 and aligned with the new Warren Freeway through the Montclair District of Oakland. The Grove-Shafter Freeway was then designated State Highway 24. In 1980, the freeway was renamed after William Byron Rumford. Tunnel fire On April 7, 1982, an accident involving a gasoline tanker truck in the third (then-northernmost) bore set off the Caldecott Tunnel fire. The accident caused major damage and the bore was closed to traffic for several months while repairs were made, with traffic temporarily reverting to the pre-third-bore configuration. During the fire, the tunnel acted as a natural chimney, venting the smoke, flames and heat uphill towards the eastern entrance to the tunnel. The accident and fire killed seven people, most of whom were overcome by toxic smoke. The fire occurred shortly after midnight when there were few cars in the tunnel; had it occurred during normal commute hours, hundreds could have died. As a result of the fire, it is now illegal to transport hazardous material in a tanker truck through the tunnel, except between the light-traffic hours of 3:00 am and 5:00 am. Oakland firestorm On October 20, 1991, the catastrophic Oakland firestorm started on the ridge north of the Caldecott Tunnel. The fire spread quickly west down both sides of the west portal of the tunnel and jumped the freeway, eventually killing 25 people and destroying over 3,000 homes, apartments and condominiums. Awards The Caldecott Tunnel was designated a City of Oakland Landmark in 1980, and received a Preservation Award from the Art Deco Society of California in 1993. Fourth bore To relieve traffic congestion in the reverse commute direction, the California Department of Transportation began planning for a fourth bore in 2000. In 2007, the California Transportation Commission approved the final funding needed to build the fourth bore. Construction started in 2010. Commencement of the project was stalled as a result of the financial crisis of 2007–2008, but was quickly back on track as a beneficiary of President Obama's American Recovery and Reinvestment Act of 2009 (ARRA). Construction got underway until completion in 2013. Much of the excavated material from the bore was trucked to Treasure Island for use in soil augmentation and remediation during the subsequent redevelopment of the island. The fourth bore contains a roadway with two