California State Route 242
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| Route information | ||||
| Defined by S&HC § 542 | ||||
| Maintained by Caltrans | ||||
| Length: | 3.398 mi[1] (5.469 km) | |||
| Major junctions | ||||
| South end: |  I-680 in Concord |
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| North end: |  SR 4 in Concord |
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| Highway system | ||||
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State highways in California(list • pre-1964)
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→State Route 242 (SR 242) is a short three-mile (5 km) connector route that links Interstate 680 north of Pleasant Hill to State Route 4 in Concord. In 2000, State Route 242 was widended to six through-traffic lanes for the entire route. Ramp metering is present at all onramps, but is not used at this time. It was signed as part of State Route 24 until ca. 1987. Currently, 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 River Delta region of Northern California.
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Route description
SR 242 is part of the California Freeway and Expressway System.[2] The route begins as a freeway at Interstate 680 in Concord. It then heads north, meeting Clayton Road, Concord Avenue, Grant Street, and Olivera Road before meeting its north end at State Route 4 just west of the former Concord Naval Weapons Station.[3]
Exit list
- Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage.
The entire route is in Concord, Contra Costa County.
| Postmile [1][4][5] |
Exit [6] |
Destinations | Notes | |
|---|---|---|---|---|
| R0.00 | 1A | I-680 south – Oakland, San Jose |
Southbound exit and northbound entrance | |
| R0.00 | 1B | Gregory Lane, Monument Boulevard | Southbound exit and northbound entrance | |
| R0.87 | 1 | Clayton Road – Concord | Northbound exit and southbound entrance | |
| R1.47 | 1C | Concord Avenue | No northbound exit | |
| R2.15 | 2 | Grant Street, Solano Way | ||
| R2.79 | 3A | Olivera Road | Northbound exit and southbound entrance | |
| R3.40 | 3 | SR 4 / Port Chicago Highway – Stockton, Pittsburg, Richmond, Martinez |
Northbound exit and southbound entrance; signed as exits 3B (west) and 3C (east) | |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | ||||
References
- ^ a b California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
- ^ CA Codes (shc:250-257)
- ^ Thomas Brothers (2008). Bay Area Metro Street Atlas [map].
- ^ California Department of Transportation, Log of Bridges on State Highways, July 2007
- ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- ^ California Department of Transportation, California Numbered Exit Uniform System, SR-242 Northbound and SR-242 Southbound, accessed February 2008
