California State Route 14
State Route 14 is a north–south state highway in the U.S. state of California that connects Los Angeles to the northern Mojave Desert. The southern portion of the highway is signed as the Antelope Valley Freeway. Its southern terminus is at Interstate 5 in the Los Angeles neighborhoods of Granada Hills and Sylmar just immediately to the south of the border of the city of Santa Clarita. SR 14's northern terminus is at U.S. Route 395 near Inyokern. Legislatively, the route extends south of I-5 to SR 1 in the Pacific Palisades area of Los Angeles; however, the portion south of the junction with I-5 has not been constructed. The southern part of the constructed route is a busy commuter freeway serving and connecting the cities of Santa Clarita, Palmdale, and Lancaster to the rest of the Greater Los Angeles area. The northern portion, from Vincent to US 395, is legislatively named the Aerospace Highway, as the highway serves Edwards Air Force Base, once one of the primary landing strips for NASA's Space Shuttle, as well as the Naval Air Weapons Station China Lake that supports military aerospace research, development and testing. This section is rural, following the line between the hot Mojave desert and the forming Sierra Nevada mountain range. Most of SR 14 is loosely paralleled by a rail line originally built by the Southern Pacific Railroad, and was once the primary rail link between Los Angeles and Northern California. While no longer a primary rail line, the southern half of this line is now used for the Antelope Valley Line of the Metrolink commuter rail system.
Linked with US 395, this road also connects Los Angeles with such places as Mammoth Mountain, Mono Lake, Yosemite National Park and Reno, Nevada. SR 14 was part of US 6 prior to truncation in 1964, when US 6 was a coast-to-coast route from Long Beach to Provincetown, Massachusetts. The non-freeway segment of SR 14 from Silver Queen Road north of Rosamond to Mojave is known as Sierra Highway, as is the old routing between I-5 and Silver Queen Road where SR 14 has been moved to a newer freeway alignment. Portions of SR 14 remain signed with names associated with US 6, including Midland Trail, Theodore Roosevelt Highway, and Grand Army of the Republic Highway.
Route description
SR 14 is part of the California Freeway and Expressway System, and is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.Antelope Valley Freeway
The southern portion of the freeway, from I-5 to the Avenue D exit near Lancaster, has been designated the Antelope Valley Freeway by the state legislature. The Antelope Valley Freeway begins in the Santa Susana Mountains at the Newhall Pass interchange by splitting from the Golden State Freeway. This is the busiest portion of the route with an annual average daily traffic count of 169,000 vehicles per day. The freeway forms much of the eastern boundary of Santa Clarita along its route. Past Santa Clarita, the road continues northeast and crosses the Sierra Pelona Mountains and western San Gabriel Mountains via the canyon of the seasonal Santa Clara River. The ascent is mostly rugged and rural terrain, with only two small towns along the ascent, first Agua Dulce and later Acton. In Agua Dulce, the freeway forms the southern boundary of Vasquez Rocks Park, a county park. The highway crests the Sierra Pelona Mountains via Escondido Summit, at an elevation of, before descending and passing by Acton to the north. The highway then crests the San Gabriel Mountains via Soledad Pass, at an elevation of. The route of the highway through the mountains loosely parallels that of the Metrolink Antelope Valley Line.After cresting both mountain passes, the highway descends into the Antelope Valley, a large valley within the Mojave Desert. The highway crosses Angeles Forest Highway and the California Aqueduct in the descent. SR 14 serves as the primary north–south thoroughfare for the communities of Palmdale and Lancaster. Between Palmdale Boulevard and Avenue D in Lancaster, SR 14 runs concurrently with SR 138.
Aerospace Highway
From the Pearblossom Highway exit south of Palmdale to its northern terminus at US 395 near Inyokern, SR 14 has been designated the Aerospace Highway. Between Pearblossom Highway and Avenue S, there is a vista point overlooking Lake Palmdale, which features a historic plaque that honors aviation accomplishments including the Space Shuttle, breaking the sound barrier and the speed record. The freeway passes the Los Angeles–Kern county line at Avenue A, and continues to run north through Rosamond and Mojave. In Rosamond, the highway passes close to Edwards Air Force Base, which was often used as one of the main landing strips for NASA's Space Shuttle, and as the base for the X-15 and many other air and spacecraft.The freeway portion terminates just south of Mojave, where SR 14 serves as the main street and runs through the downtown area. To the east of the route is Mojave Air & Space Port, home to the National Test Pilot School and SpaceShipOne, the first privately funded human spaceflight, as well as a vast airplane graveyard; all are visible from SR 14.
SR 58 was formerly routed concurrently with SR 14 through Mojave, before it was rerouted onto a bypass running north and east of the town.
The character of the highway changes as it leaves California City with the last interchange located at California City Boulevard. Now a divided highway with at-grade intersections, departs the corridor of the rail main, to follow the crest of the forming Sierra Nevada mountains. The route continues to follow a branch line of the Union Pacific Railroad used as a connector for the Trona Railway. The main line of the railroad proceeds towards the Central Valley via Tehachapi Pass. Though SR 14 heads away from the pass, the highway has views of the mountains and the Tehachapi Pass Wind Farm. The scenery also changes, as the highway departs the Mojave Desert and crosses Red Rock Canyon State Park. Traffic counts drop dramatically as the highway becomes more rural, with an AADT of 3,200 vehicles at the northern terminus. SR 14 continues north toward US 395 in Inyokern, much of its routing as an expressway. Towards its northern terminus, SR 14 runs briefly concurrently with SR 178. At its northern terminus, SR 14 merges with US 395 as it turns into an expressway heading north to Bishop. As US 395 the route continues to follow the crest of the Sierra Nevada, serving Owens Valley, Mammoth Mountain, Yosemite National Park and Mono Lake.
History
Trails
The first road to use the general alignment of modern SR 14 was called the El Camino Sierra, or Sierra Highway, which extended from Los Angeles to Lake Tahoe. A dirt road was completed in the 1910s from what had been a pack trail. The Los Angeles Times declared El Camino Sierra complete in 1931, when the portion from Mojave to the Owens Valley, along modern US 395, was paved.During the late 19th century, the corridor of modern SR 14 was also in use by the Southern Pacific Railroad. South of Mojave was used for a main line, the corridor north of Mojave follows a branch line. The main line connected Los Angeles with the Central Valley, via Soledad Pass and Tehachapi Pass. While significantly longer than the more direct Ridge Route, Tehachapi Pass is lower than Tejon Pass along the Ridge Route, with a longer, less steep grade on the descent into the Central Valley. While the Tehachapi Pass portion of this line has remained the same, over time another route was built from Mojave, across the Antelope Valley towards Cajon Pass to cross the San Gabriel Mountains, there merging with another main rail trunk to Los Angeles. The Cajon Pass fork remains the primary freight rail line to connect southern and northern California in use today, now owned and operated by the Union Pacific Railroad. The fork paralleling SR 14 and crossing at Soledad Pass is still a contiguous line, but not used for through freight traffic as a significant portion was sold to the predecessors of the Southern California Regional Rail Authority to become the Antelope Valley Line of the Metrolink commuter rail service. The branch north of Mojave was built when the Southern Pacific acquired the unfinished Carson and Colorado Railroad in 1900. The Southern Pacific built a standard gauge connector to the narrow gauge Carson and Colorado line from their main at Mojave. Although plans were to eventually convert this acquired line to standard gauge, most of the line was abandoned before the conversion was complete. The southern portion of this line is still active and connects to the Trona Railway.
The Midland Trail was one of the first organized coast-to-coast trails in the United States. In the trail's infancy, its routing changed numerous times. By 1925, the Midland Trail was established along what is modern State Route 168, joining El Camino Sierra in Big Pine. Other named trails that eventually followed this route included the Theodore Roosevelt highway, and Grand Army of the Republic Highway. Parts of modern SR 14 continue to be signed with these names, and north of Los Angeles County is still officially designated "El Camino Sierra / Midland Trail" as well as the aforementioned "Aerospace Highway".
U.S. Route 6
was extended from Greeley, Colorado, to Long Beach, California, on June 21, 1937. Most of this extension used the Midland Trail, although the route entered California from Nevada slightly north of the previous route of the Midland Trail, instead passing through Bishop. While being designated US 6, parts of modern SR 14 were upgraded to freeway standards.As part of the 1964 state highway renumbering, US 6 was truncated at Bishop. The portion of US 6 from Inyokern to Los Angeles was designated SR 14. Previously, the SR 14 designation was used for Artesia Boulevard and Lincoln Avenue, in the Los Angeles area, a portion of modern SR 91.
Between 1963 and 1975, significant portions of US 6/SR 14 were moved to a freeway alignment. The former routing south of Mojave is still known as Sierra Highway. The first freeway section, from just east of Solemint Junction to Red Rover Mine Road, was completed in 1963. Further portions in the intercanyon areas of Acton to Soledad Pass were completed by 1965. By 1966, the freeway was complete as far north as Avenue P-8 in Palmdale. The freeway was completed to Mojave by 1972.