California State Route 24

State Route 24
State Route 24
	SR 24 highlighted in red
Route information
	Maintained by Caltrans
Length	13.492 mi (21.713 km)
Existed	1934–present
Tourist; routes	SR 24 between the Caldecott Tunnel and Walnut Creek
Restrictions	Trucks carrying hazardous material are only permitted through the Caldecott Tunnel between 3:00 a.m. and 5:00 a.m.
Major junctions
West end	I-580 / I-980 in Oakland
	SR 13 in Oakland
East end	I-680 / Mount Diablo Boulevard in Walnut Creek
Location
Country	United States
State	California
Counties	Alameda, Contra Costa
Highway system
	State highways in California; Interstate; US; State; Scenic; History; Pre‑1964; Unconstructed; Deleted; Freeways;

State Route 24 (SR 24) is a heavily traveled east–west state highway in the U.S. state of California that serves the eastern side of the San Francisco Bay Area. A freeway throughout its entire length, it runs from the Interstate 580/Interstate 980 interchange (just east of the MacArthur Maze) in Oakland, and through the Caldecott Tunnel under the Berkeley Hills, to the Interstate 680 junction in Walnut Creek. It lies in Alameda County, where it is highly urban, and Contra Costa County, where it passes through wooded hillsides and suburbs. SR 24 is a major connection between the San Francisco–Oakland Bay Bridge/MacArthur Maze complex and the inland cities of the East Bay.

^ California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
^ California Highways: State Route 24
^ "Vehicle Code Section 31301 - Caldecott Tunnel Restriction". California Department of Motor Vehicles. Retrieved July 21, 2014.
^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved March 27, 2019.