Route 11 was a planned route from the northerly border of the new Federal Port of Entry and east of the Otay Mesa Port of Entry to near the junction of Route 125 and Route 905. Route 11 was originally the Harbor Freeway before 1984, when it was renumbered as Route 110. California State Route 125 currently runs from California State Route 54 in San Diego to California State Route 52 in Santee. ... JUNCTION POSTMILE Mexican Border SD 0. ...

Route 48 originally ran between Interstate 5 and Route 14 in Lancaster, but this was transferred to Route 138 in 1995. Route 48 is now defined to run between Route 14 and the to-be-constructed Route 122. Interstate 5 (abbreviated I-5) is the westernmost interstate highway in the United States. ... JUNCTION POSTMILE I-5 LA 24. ... City nickname:The Heart of the Antelope Valley County Los Angeles County, California Area  - Total  - Water 243. ... Hockneys Pearblossom Highway California State Route 138 is an east-west highway generally following the northern foothills of the San Gabriel Mountains of southern California, USA between Gorman, junction Interstate 5 eastward to Crestline, junction California State Route 18 in the San Bernardino Mountains. ...

Route 64 is defined from Route 1 near Malibu Beach to Interstate 5 south of San Fernando. JUNCTION POSTMILE I-5 ORA 0. ... Interstate 5 (abbreviated I-5) is the westernmost interstate highway in the United States. ...

Route 81 is defined from Interstate 215 east of Riverside to Interstate 15 south of Devore. JUNCTION POSTMILE I-15 SBD 17. ... Interstate 15 (abbreviated I-15) is the fourth longest north-south transcontinental interstate highway in the United States, traveling through the states of Montana, Idaho, Utah, Arizona, Nevada, and California. ...

Route 100 was a planned loop in Santa Cruz, running from Route 1 on the west side of the city, through the downtown area and terminating in the vicinity of the Route 1/Route 17 junction. Ocean Street is believed to parallel a portion of the planned alignment. JUNCTION POSTMILE I-5 ORA 0. ... JUNCTION MILE POST I-880 SCL 13. ...

Route 122 is planned to run from Route 14, south of Palmdale, heading northeast past Edwards Air Force Base to Route 58. JUNCTION POSTMILE I-5 LA 24. ... City nickname:Aerospace Capital of America County Los Angeles County, California Area  - Total  - Water 272. ... Edwards Air Force Base is a USAF airbase located on the border of Kern County and Los Angeles County, California in the Antelope Valley, 7 miles (11 km) due East of Rosamond, USA at 34°57′ N 117°52′ W. An airbase since 1933, Edwards has long been a home... JUNCTION POSTMILE US-101 SLO 0. ...

Route 230 is set to run from U.S. Highway 101 near the south city limits of San Francisco to Route 280 in San Francisco.

In 1964, this highway ended at an unconstructed Route 87. (Route 87 in turn was to have run on the east side of Route 101, over the San Francisco Bay.) In 1970, the portion of former Route 87 from Route 230 to Route 280 was transferred to Route 230. It is speculated that this route would be the approach to a "Southern Crossing" of the bay.

Route 234 is an unconstructed southern bypass of Stockton, set to run from Route 5 to Route 99 via French Camp. French Camp Road parallels the defined alignment.

Route 235 is an unconstructed northern bypass of Stockton, set to run from Route 5 to Route 99 north of the Calaveras River. Eight Mile Road parallels the defined alignment.

Caltrans has no plans to build either bypass or adopt either traversable road as a state highway.

Route 249 is set to run from Route 2 north of La Cañada Flintridge to Route 14 south of Palmdale. The route would cut through the San Gabriel Mountains and the Angeles National Forest. It would connect with an also-unbuilt extension of Route 118. Angeles Forest Highway, Los Angeles County Route N3, parallels the defined alignment.

In recent years, there has been talk of constructing a highway parallel to Route 249, which would tunnel across the mountains. According to the L.A. Daily News, Los Angeles County and Palmdale would spend $125,000 on a new study regarding building a highway across the Angeles National Forest by tunneling through the San Gabriel Mountains. A separate study conducted in 2002 looked at building the highway as a privately financed toll road. Said study concluded that it may cost $2.2 billion and was unlikely to pay for itself with tolls low enough to be acceptable to motorists. Previous plans have looked at creating a 21-mile-long highway that would branch off the Antelope Valley Freeway south of Palmdale and head south and a little west to the Foothill Freeway at its intersection with the Glendale Freeway.

Route 251 is an unconstructed state highway with two alignments:

• Route 580 near Point San Quentin to Route 101 near Greenbrae.
• Route 101 near San Rafael to Route 1 near Point Reyes Station.

Sir Francis Drake Boulevard parallels the first defined alignment. The second alignment was added to Route 251 in 1984 as a transfer from Route 17, the latter route having been renumbered as Interstate 580 across the San Rafael-Richmond Bridge.

Originally, this was to have been the Point Reyes Freeway. Environmental concerns and costs killed this freeway.

Route 257 is a planned freeway from Route 34 in the vicinity of Oxnard to U.S. Highway 101 in Ventura. It was defined in 1965. 5th Street and Harbor Boulevard west of Route 1 parallel the defined alignment. This route was still on the Caltrans District 7 Master Plan Status Map in 2003.

Route 276 is set to run from Route 198 near Three Rivers, just south of the entrance to Sequoia National Park, to Oak Grove. It was defined in 1976. Its adopted alignment parallels the M375 road in Tulare County and approaches another park entrance. Caltrans has no plans to build Route 276 or upgrade the M375 road.

Originally, it was intended to be a toll road that would serve a Disney development at Mineral King. A portion of the route to Mineral King was later rescinded. The deleted segment is now within Sequoia National Park. It was not in the park at the time of adoption, nor at the time of recission.