add site
services
publishers
database
health videos
toolbar
stats
live show
health store
more stuff
JOIN/LOGIN
| advertise add site services publishers database health videos
| | about toolbar stats live show health store more stuff JOIN/LOGIN |
To fight influenza A (H1N1), antivirals en route to all states infectiousdiseasenews.com | To fight influenza A (H1N1), antivirals en route to all states pediatricsupersite.com | California State Physical Therapy - Family Friendly - California State... in2physicaltherapy.com | Honorable Brian Setencich Speaker California State Assembly State collegeofmidwives.org |
For other uses, see CA4.
State Route 4 is a state highway in the U.S. state of California, routed from Interstate 80 in the San Francisco Bay Area to State Route 89 in the Sierra Nevada. It passes through Ebbetts Pass and contains the Ebbetts Pass Scenic Byway, a National Scenic Byway. SR 4 roughly parallels the Sacramento-San Joaquin River Delta, a popular area for boating and fishing. There are a number of accesses to marinas and other attractions.
[edit] Route description State Route 4 is part of the California Freeway and Expressway System[3] and is eligible for the State Scenic Highway System[4]. However, it is only a scenic highway as designated by Caltrans from a point east of Arnold to SR 89.[5] SR 4 is also known as the John Muir Parkway from I-80 in Hercules to I-680 near Martinez, named for the environmentalist John Muir.[6] The stretch through Franklin Canyon was once known as "Blood Alley."[7] SR 4, an east-west highway, begins in Hercules at San Pablo Avenue next to the Interstate 80 junction as part of John Muir Parkway. (The actual parkway extends a bit past the western terminus.) The road is an expressway between from its starting point until it approaches Martinez, at which point it becomes a full freeway (the California Delta Highway) passing Concord, Pittsburg, and Antioch. The John Muir National Historic Site, located directly north of Route 4 on Alhambra Avenue in Martinez. Also on Alhambra Avenue at SR 4 is the Franklin Canyon Adobe. BART tracks run in the median of the freeway from the Port Chicago Highway interchange in Concord to the Bailey Road interchange in Bay Point, where the line currently ends at the Pittsburg/Bay Point Station. Access to that station is provided by a pedestrian bridge crossing over the eastbound lanes of Highway 4. After Antioch, the freeway turns northward toward the Antioch Bridge to become State Route 160, and Route 4 separates to become a suburban and rural road passing through the Bay Area's outermost eastern suburbs (Oakley and Brentwood). Route 4 continues to Stockton, where it briefly joins I-5 and then enters a separate freeway routing almost directly through downtown Stockton. The route then runs concurrent with State Route 99 before running eastward into the Sierra through Angels Camp, one of the richest quartz mining sections of the Mother Lode and home of "The Celebrated Jumping Frog of Calaveras County", and Calaveras Big Trees State Park. The route runs through the 8,050 ft (2,450 m). (2,454 m) Pacific Grade Summit on its way up to the 8,730 ft (2,660 m). (2,661 m) Ebbetts Pass (being Northern California's highest road) and ends at State Route 89 ten miles (16 km) west of Topaz Lake, on the California–Nevada border. The portion from Arnold to its terminus is designated the Ebbetts Pass Scenic Byway, which is eventually one lane. Through the mountains, SR 4 is not suitable for large trucks, buses, or RVs, as it becomes very steep and narrow, with no center dividing line shortly after the Mount Reba Turnoff to Bear Valley Ski area, with tight switchbacks. The pass is not plowed for snow, and thus closes during the winter months often from November through as late as May. Thus, no passage between the Mount Reba Turnoff and Markleeville is possible. The western slope is plowed and rarely closes, even for a few hours, but often has chain restrictions during and immediately following storms, usually just east of Arnold. The eastern slope is not plowed. As of April 2006, a freeway extension from the route 160 junction bypassing Oakley and Brentwood to the south and west is in the various stages of planning and construction. [1] [2] [edit] HistoryAlthough segments of SR 4 were part of the state highway system since 1909, SR 4 was officially designated as such between Interstate 80 and State Route 99 in 1934. Prior to that date, the then existing segment was officially known as the "Borden Highway", and the bridge over the San Joaquin River is still referred to as the "Borden Highway Bridge" in tidal tables. Construction of SR 4 did not finish until 1935, however.[2] The portion of SR 4 from Interstate 80 to State Route 24 was added to the highway system in 1933 as LRN 106. East of the concurrency with State Route 24 to State Route 49, SR 4 was designated as LRN 75 from 1931-1934. Finally, the segment from State Route 49 to State Route 89 was signed as LRN 24 from 1909 to 1934.[2] The freeway segment of SR 4 in Stockton is part of a proposed route to upgrade SR 99 into a future Interstate highway. Under one proposal, the new interstate would go along SR 99 from the split with I-5 at Wheeler Ridge north through Fresno to Stockton, where the proposed route would then turn west via the SR 4 freeway to a terminus at I-5.  [edit] Major intersections
[edit] References
[edit] External links
Categories: State highways in California | San Francisco Bay Area freeways | Juan Bautista de Anza National Historic Trail | Freeways in California | Roads in Contra Costa County, California | Roads in San Joaquin County, California | Roads in Stanislaus County, California | Roads in Calaveras County, California | Roads in Alpine County, California | Scenic highways in California | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ↑ top of page ↑ | about thumbshots |
.svg){kind=small}
