California State Route 242

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State Route 242

Defined by S&HC § 542, maintained by Caltrans

Length:

3.58 mi^[1] (5.76 km)

South end:

I-680 in Concord

North end:

SR 4 in Concord

State highways in California (list - pre-1964)
County routes in California (list)
< SR 241		SR 243 >
History - Unconstructed - Deleted - Freeway - Scenic

State Route 242 is a short three-mile 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.

This route is part of the California Freeway and Expressway System^[2].

Major cities Bolded cities are officially-designated control cities for signs
Oakland (southbound; via I-680 and SR 24) Concord Pittsburg (northbound; via SR 4)

[edit] 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 ^[3]^[4]^[5]	#^[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)