California State Route 242
State Route 242 (SR 242) is a three-mile (5 km) state highway in the U.S. state of California that links Interstate 680 north of Pleasant Hill to State Route 4 in Concord in Contra Costa County. Along with Interstate 580, State Route 24, Interstate 680 and State Route 4, it serves as the most direct route between the San Francisco Bay Area and the Sacramento–San Joaquin River Delta region.
State Route 242 | ||||
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SR 242 highlighted in red | ||||
| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 3.398 mi (5.469 km) | |||
| Existed | 1987–present | |||
| Major junctions | ||||
| South end | I-680 in Concord | |||
| North end | SR 4 in Concord | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Contra Costa | |||
| Highway system | ||||
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In 2000, State Route 242 was widened to six through-traffic lanes for the entire route. Ramp metering is present at all onramps, and is used southbound in the morning and northbound in the evening. It was signed as part of State Route 24 until ca. 1987.
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