Interstate 80 in California in the context of "Interstate 580 (California)"

The San Francisco–Oakland Bay Bridge, commonly referred to as the Bay Bridge, is a complex of bridges spanning San Francisco Bay in California. As part of Interstate 80 and the direct road between San Francisco and Oakland, it carries about 260,000 vehicles a day on its two decks. It includes one of the longest bridge spans in the United States.

The toll bridge was conceived as early as the California gold rush days, with "Emperor" Joshua Norton famously advocating for it around 1855-60, but construction did not begin until 1933. Designed by Charles H. Purcell, and built by American Bridge Company, it opened on Thursday, November 12, 1936, six months before the Golden Gate Bridge. It originally carried automobile traffic on its upper deck, with trucks, cars, buses and commuter trains on the lower, but after the Key System abandoned its rail service on April 20, 1958, the lower deck was converted to all-road traffic as well. On October 12, 1963, traffic was reconfigured to one way traffic on each deck, westbound on the upper deck, and eastbound on the lower deck, with trucks and buses also allowed on the upper deck. In 1986, the bridge was unofficially dedicated to former California governor James Rolph.

Roseville is the most populous city in Placer County, California, located within the Sacramento metropolitan area. At the 2020 census, the city's population was 147,773, making it the third-largest city in the Sacramento area. Interstate 80 runs through Roseville and State Route 65 runs through part of the northern edge of the city.

Historically associated with the railroad, the city underwent significant urban renewal in the 1980s and 1990s. Today it has become a major commercial hub, attracting regular shoppers and visitors from a large swath of rural southeastern Sacramento Valley and the Sierra Nevada foothills. In recent years, it has seen significant population growth and new single-family home developments, becoming a "boomburb" or edge city of Sacramento.

The Carquinez Bridge is a pair of parallel bridges spanning the Carquinez Strait at the northeastern end of San Francisco Bay. They form the part of Interstate 80 between Crockett and Vallejo, California, United States.

The name Carquinez Bridge originally referred to a single cantilever bridge built in 1927, which was part of the direct route between San Francisco and Sacramento. A second parallel cantilever bridge was completed in 1958 to deal with the increased traffic.

Donner Pass is a 7,056-foot-high (2,151 m) mountain pass in the northern Sierra Nevada, above Donner Lake and Donner Memorial State Park about 9 miles (14 km) west of Truckee, California. Like the Sierra Nevada itself, the pass has a steep approach from the east and a gradual approach from the west.

The pass has been used by the California Trail, First transcontinental railroad, Overland Route, Lincoln Highway and Victory Highway (both later U.S. Route 40 and still later Donner Pass Road), as well as indirectly by Interstate 80. The pass gets its name from the ill-fated Donner Party who overwintered there in 1846.