California State Route 242
Encyclopedia
State Route 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.
. 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
.
The entire route is in Concord
, Contra Costa County
.
{| class=wikitable
!Postmile
!Exit
!Destinations
!Notes
|-bgcolor=#ffdddd
|R0.00
|1A
|
|Southbound exit and northbound entrance
|-bgcolor=#ffdddd
|R0.00
|1B
|Gregory Lane, Monument Boulevard
|Southbound exit and northbound entrance
|-bgcolor=#ffdddd
|R0.87
|1
|Clayton Road – Concord
|Northbound exit and southbound entrance
|-bgcolor=#ffdddd
|R1.47
|1C
|Concord Avenue
|No northbound exit
|-
|R2.15
|2
|Grant Street, Solano Way
|
|-bgcolor=#ffdddd
|R2.79
|3A
|Olivera Road
|Northbound exit and southbound entrance
|-
|R3.40
|3
|
|Northbound exit and southbound entrance; signed as exits 3B (west, Port Chicago Highway) and 3C (east)
Interstate 680 (California)
Interstate 680 is a north–south Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to Interstate 80 at Cordelia, bypassing cities along the eastern shore of San Francisco Bay such as Oakland and Richmond while serving...
north of Pleasant Hill
Pleasant Hill, California
Pleasant Hill is a city in Contra Costa County, California, United States, in the East Bay of the San Francisco Bay Area. The population was 33,152 at the 2010 census. It was incorporated in 1961...
to State Route 4 in Concord
Concord, California
Concord is the largest city in Contra Costa County, California, USA. At the 2010 census, the city had a population of 122,067. Originally founded in 1869 as the community of Todos Santos by Salvio Pacheco, the name was changed to Concord within months...
. 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
California State Route 24
State Route 24 in the U.S. state of California is a heavily-traveled east–west freeway in the eastern side of the San Francisco Bay Area of northern California that runs from the Interstate 580/Interstate 980 interchange in Oakland to the Interstate 680 junction in Walnut Creek...
until ca. 1987. Currently, along with Interstate 580
Interstate 580 (California)
Interstate 580 is an 80-mile east–west Interstate Highway in Northern California. The heavily traveled spur route of Interstate 80 runs from San Rafael in the San Francisco Bay Area to Interstate 5 near Tracy in the Central Valley...
, State Route 24
California State Route 24
State Route 24 in the U.S. state of California is a heavily-traveled east–west freeway in the eastern side of the San Francisco Bay Area of northern California that runs from the Interstate 580/Interstate 980 interchange in Oakland to the Interstate 680 junction in Walnut Creek...
, Interstate 680
Interstate 680 (California)
Interstate 680 is a north–south Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to Interstate 80 at Cordelia, bypassing cities along the eastern shore of San Francisco Bay such as Oakland and Richmond while serving...
, and State Route 4, it serves as the most direct route between the San Francisco Bay Area
San Francisco Bay Area
The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...
and the Sacramento River Delta
Sacramento River Delta
The Sacramento-San Joaquin River Delta, or California Delta, is an expansive inland river delta and estuary in northern California in the United States. The Delta is formed at the western edge of the Central Valley by the confluence of the Sacramento and San Joaquin rivers and lies just east of...
region of Northern California.
Route description
SR 242 is part of the California Freeway and Expressway SystemCalifornia Freeway and Expressway System
The California Freeway and Expressway System is a system of existing or planned freeways and expressways in the U.S. state of California. It is defined by the Streets and Highways Code.-List of roads in the system:*State Route 1 *State Route 2...
. The route begins as a freeway at Interstate 680
Interstate 680 (California)
Interstate 680 is a north–south Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to Interstate 80 at Cordelia, bypassing cities along the eastern shore of San Francisco Bay such as Oakland and Richmond while serving...
in Concord
Concord, California
Concord is the largest city in Contra Costa County, California, USA. At the 2010 census, the city had a population of 122,067. Originally founded in 1869 as the community of Todos Santos by Salvio Pacheco, the name was changed to Concord within months...
. 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
Concord Naval Weapons Station
Concord Naval Weapons Station was a military base established in 1942 north of the city of Concord, California at the shore of the Sacramento River where it widens into Suisun Bay. The station functioned as a World War II armament storage depot, supplying ships at Port Chicago...
.
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
Concord, California
Concord is the largest city in Contra Costa County, California, USA. At the 2010 census, the city had a population of 122,067. Originally founded in 1869 as the community of Todos Santos by Salvio Pacheco, the name was changed to Concord within months...
, Contra Costa County
Contra Costa County, California
Contra Costa County is a primarily suburban county in the San Francisco Bay Area of the U.S. state of California. As of the 2010 census, it had a population of 1,049,025...
.
{| class=wikitable
!Postmile
!Exit
Exit number
An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....
!Destinations
!Notes
|-bgcolor=#ffdddd
|R0.00
|1A
|
|Southbound exit and northbound entrance
|-bgcolor=#ffdddd
|R0.00
|1B
|Gregory Lane, Monument Boulevard
|Southbound exit and northbound entrance
|-bgcolor=#ffdddd
|R0.87
|1
|Clayton Road – Concord
Concord, California
Concord is the largest city in Contra Costa County, California, USA. At the 2010 census, the city had a population of 122,067. Originally founded in 1869 as the community of Todos Santos by Salvio Pacheco, the name was changed to Concord within months...
|Northbound exit and southbound entrance
|-bgcolor=#ffdddd
|R1.47
|1C
|Concord Avenue
|No northbound exit
|-
|R2.15
|2
|Grant Street, Solano Way
|
|-bgcolor=#ffdddd
|R2.79
|3A
|Olivera Road
|Northbound exit and southbound entrance
|-
|R3.40
|3
|
|Northbound exit and southbound entrance; signed as exits 3B (west, Port Chicago Highway) and 3C (east)