County Route J4 (California)

Infobox road
state=CA
type=CR
route=J4
marker_

alternate_name=Grant Line Road, Byron Highway
maint=


length_mi=27.99
length_round=0
length_ref=
established=1960
direction_a=South
terminus_a=jct|state=CA|CR|J3|county1=San Joaquin near Tracy
junction=
direction_b=North
terminus_b=Jct|state=CA|SR|4 near Stockton

County Route J4 is a county road in central California that runs convert|28|mi|km|0 nominally north-south across portions of San Joaquin County, Alameda County and Contra Costa County that are growing in population and suburbanization. The highway connects the suburbs of the far outer East Bay and the Sacramento River Delta with the northern San Joaquin Valley.

The route begins convert|9|mi|km|0 southeast of Tracy at County Route J3, passes through Tracy and Byron, and terminates at State Route 4 between Discovery Bay and Brentwood.

The portion between Tracy and Brentwood lies along the unconstructed corridor of State Route 239. SAFETEA-LU, federal legislation enacted in 2005, [http://www.fhwa.dot.gov/safetealu/legis.htm authorized $14 million] in federal appropriations toward construction of the route.

Towns and cities

*Tracy
*Mountain House
*Byron

ee also

* List of California County Routes

Links

* [http://www.cahighways.org/ California Highways]
** [http://www.cahighways.org/countyj.html#J4 County Route J4]
** [http://www.cahighways.org/233-240.html#239 State Route 239]
* [http://www.westcoastroads.com/california/misc_ca_county_10.html WestCoastRoads.com: California "J" County Routes]