Interstate 238 (I-238) is an auxiliary Interstate Highway in the San Francisco Bay Area in the U.S. state of California. It comprises the northernmost 2.126 miles (3.421 km) of Route 238, as defined by the California Streets and Highways Code. Originally signed as State Route 238 (SR 238) until 1983, it connects I-580 in Castro Valley with I-880 in San Leandro.
Interstate 80 (I-80) is an east–west transcontinental freeway in the United States that runs from downtown San Francisco, California, to Teaneck, New Jersey, in the New York City Metropolitan Area. The highway was designated in 1956 as one of the original routes of the Interstate Highway System. Its final segment was opened to traffic in 1986. It is the second-longest Interstate Highway in the United States, following I-90. The Interstate runs through many major cities including Oakland, Sacramento, Reno, Salt Lake City, Omaha, Des Moines, and Toledo, and passes within 10 miles (16 km) of Chicago, Cleveland, and New York City.
Interstate 880 (I-880) is a major north–south auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from I-280 and State Route 17 (SR 17) in San Jose to I-80 and I-580 in Oakland, running parallel to the eastern shore of San Francisco Bay. For most of its route, I-880 is officially known as the Nimitz Freeway, after World War II fleet admiral Chester Nimitz, who retired to the Bay Area and lived on Yerba Buena Island. The northernmost five miles is also commonly referred to as the Cypress Freeway, after the former alignment of the freeway, and its subsequent replacement.
Interstate 580 (I-580) is an approximately 82-mile-long (132 km) east–west auxiliary Interstate Highway in Northern California. The heavily traveled spur route of I-80 runs from US 101 in San Rafael in the San Francisco Bay Area to I-5 near Tracy in the Central Valley. I-580 forms a concurrency with I-80 between Albany and Oakland, the latter of which is the location of the MacArthur Maze interchange immediately east of the San Francisco–Oakland Bay Bridge. I-580 provides a connection from the Bay Area to the southern San Joaquin Valley and Southern California via I-5, as I-5 bypasses the Bay Area to the east.
Interstate 980 (I-980) is a short 2.0-mile (3.2 km) auxiliary Interstate Highway spur entirely within the City of Oakland in Northern California, connecting Interstate 580 and State Route 24 to Interstate 880 near Downtown Oakland. I-980 passes the Oakland Convention Center and near the famous Jack London Square. I-980 is commonly considered the dividing line between Downtown Oakland and West Oakland. The freeway was planned as the eastern approach to the San Francisco Bay Southern Crossing. It is officially known as the John B. Williams Freeway, after the former director of the City of Oakland's Office of Community Development.
Interstate 280 (I-280) is a 57.5-mile-long (92.5 km) major north–south auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from I-680 and US 101 in San Jose to King and Fifth Streets in San Francisco, running just to the west of the larger cities of San Francisco Peninsula for most of its route.
Interstate 480 (I-480) is a 4.90-mile-long (7.89 km) auxiliary Interstate Highway that connects Interstate 80 in downtown Omaha, Nebraska, with Interstate 29 in Council Bluffs, Iowa. The portion of I-480 in Nebraska has been named the Gerald R. Ford Expressway, named in honor of the former President, who was a native of Omaha. For most of its length, I-480 is overlapped by a U.S. Highway; for two miles (3.2 km) with U.S. Route 75 and for one mile (1.6 km) with U.S. Route 6. I-480 includes the Grenville Dodge Memorial Bridge over the Missouri River.
State Route 92 is a state highway in the U.S. state of California, serving as a major east-west corridor in the San Francisco Bay Area. From its west end at State Route 1 in Half Moon Bay near the coast, it heads east across the San Francisco Peninsula and the San Mateo–Hayward Bridge to downtown Hayward in the East Bay at its junction with State Route 238 and State Route 185. It has interchanges with three freeways: Interstate 280, U.S. Route 101 in or near San Mateo, and Interstate 880 in Hayward. It also connects indirectly to Interstates 238 and 580 by way of Hayward's Foothill Boulevard, which carries Route 238 and flows directly into Route 92.
State Route 237 is a state highway in the U.S. state of California that runs from El Camino Real in Mountain View to Interstate 680 in Milpitas. Known as the Southbay Freeway for most of its length, SR 237 runs south of the San Francisco Bay, connecting the East Bay to the Peninsula.
Interstate 129 (I-129) is an auxiliary Interstate Highway which connects South Sioux City to Interstate 29 in Sioux City, Iowa. Opened in 1976, I-129 is a 3.48-mile-long (5.60 km) route, running 3.21 miles (5.17 km) in Nebraska. At 0.27 miles (0.43 km), Interstate 129 is the shortest highway in the state of Iowa. All of the route's length is concurrent with US 20 and most of its length is concurrent with US 75. Interstate 129 is also one of only four auxiliary interstate highways to go into a state its parent route does not.
The MacArthur Maze is a large freeway interchange near the east end of the San Francisco–Oakland Bay Bridge in Oakland, California. It splits Bay Bridge traffic into three freeways—the Eastshore (I-80/I-580), MacArthur (I-580) and Nimitz (I-880).
Interstate 280 (I-280) is an auxiliary highway that makes up the western and southern portions of the beltway around the Quad Cities of Illinois and Iowa. The freeway starts at I-80 near Davenport, Iowa and ends at I-80 near Colona, Illinois; its eastern part runs concurrent with I-74 to return to I-80. I-280 forms the southern part of a circle around the Quad Cities as well as forming part of a bypass for U.S. Highway 61 around Davenport. This road is 26.98 miles (43.42 km) long.
State Route 262, commonly known as Mission Boulevard, is a state highway in the U.S. state of California. The approximately 1.07-mile (1.72 km) route connects two Interstate highways in Fremont in the San Francisco Bay Area, Interstate 680 and Interstate 880.
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. The segment of I-80 in California runs east from San Francisco across the Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley. I-80 then traverses the Sierra Nevada, cresting at Donner Summit, before crossing into the state of Nevada within the Truckee River Canyon. The speed limit is at most 65 miles per hour (105 km/h) along the entire route instead of the state's maximum of 70 mph (110 km/h) and most of the route is in either urban areas or mountainous terrain. I-80 has portions designated as the Eastshore Freeway and Alan S. Hart Freeway.
Interstate 680 (I-680) in Nebraska and Iowa is the northern bypass of the Omaha – Council Bluffs metropolitan area. I-680 spans 16.49 miles (26.54 km) from its southern end in western Omaha to its eastern end near Crescent, Iowa. The freeway passes through a diverse range of scenes and terrains – the urban setting of Omaha, the Missouri River and its valley, the rugged Loess Hills, and the farmland of Pottawattamie County, Iowa.
Iowa Highway 191 is a highway in western Iowa. It runs for 22.65 miles (36.45 km) in a north–south direction. For its entire length, Iowa 191 closely parallels Mosquito Creek and a line of the BNSF Railway. Iowa 191 begins at Interstate 880 north of Neola and ends at Iowa Highway 37 in Earling. Previously, it began at U.S. Route 6 in Council Bluffs until 1981, and the city limits of Council Bluffs until July 1, 2003. This old segment of highway ran through Underwood and Neola, and is now Pottawattamie County Road G8L.
Interstate 35 (I-35) is a north–south Interstate Highway in the United States that runs from Laredo, Texas, to Duluth, Minnesota. In Iowa, the highway runs from south to north through the center of the state, roughly parallel to U.S. Highway 69 (US 69) and US 65. It enters the state near Lamoni from Missouri and continues north through the southern Iowa drift plain. In the Des Moines area, I-35 is overlapped by I-80 and the two routes bypass Des Moines to the west and north. I-235, the only auxiliary route of I-35, serves the suburbs and downtown Des Moines; it begins and ends at the two interchanges where I-35 and I-80 meet. Near Mason City and Clear Lake, US 18 and Iowa Highway 27 (Iowa 27) overlap with I-35. Shortly after, US 18 splits off to the west in Clear Lake, while Iowa 27 runs with I-35 until they reach the Minnesota state line.
Interstate 880 (I-880) is an Interstate Highway in Iowa. Its route was created in 2019 from a section of I-680 in order to facilitate the movement of I-29 traffic around Council Bluffs in the event of Missouri River flooding. It follows the same routing as Interstate 80N (I-80N), which originally connected I-29 and I-80 from 1966 to 1973.
