State Route 56 (SR 56) is an east–west state highway in the U.S. state of California. It runs 9.210 miles (14.822 km) from Interstate 5 (I-5) in the Carmel Valley neighborhood of San Diego to I-15. The eastern terminus of the highway is also the western end of the Ted Williams Parkway. SR 56 serves as an important connector between I-5 and I-15, being the only east–west freeway between SR 78 in north San Diego County, several miles away, and SR 52 near Marine Corps Air Station Miramar. It is also named the Ted Williams Freeway, after the San Diego-born baseball player.
SR 56 was added to the state highway system in 1959 as Legislative Route 278, and was renumbered SR 56 in the 1964 state highway renumbering. Plans in 1964 were to connect SR 56 to the north end of SR 125 and continue east to SR 67, but these plans did not come to fruition. The eastern end from Black Mountain Road to I-15 was completed in 1993; the western end from I-5 to Carmel Creek Road was completed in 1995 after several lawsuits filed by the Sierra Club and other community groups. The two ends were not connected until the middle portion of the freeway was completed in 2004. The delay was largely due to funding issues and environmental concerns.
The following highways are numbered 56:
State Route 56 is a highway completely within Iron County in southwestern Utah going from the Utah/Nevada border to Cedar City.
From its western terminus on the Nevada border near Modena, the route heads northeast until reaching Modena, where it turns southeast. It continues this direction until Newcastle, where it begins heading east and then southeast. After a junction with Pinto Road, it leaves the Harmony Mountains, enters Cedar Valley, then the route heads northeast until entering Cedar City, where it runs east until its eastern terminus.
The road from Beryl Junction west to Modena became a state highway in 1918, and in 1927 the legislature extended it west to the Nevada state line (at SR 25) and numbered it as part of SR-18. A connection from SR-18 at Beryl Junction east to SR-1 (US-91, now SR-130) in Cedar City was added in 1931 as State Route 56, and in 1935 that route absorbed the segment of SR-18 to the state line.
SR-56 originally crossed the mountains between Cedar City and Beryl Junction via Desert Mound, following the present Desert Mound Road. Two branches from SR-56 to Iron Mountain were added in 1935: State Route 120 directly south from about the midpoint (never built), and State Route 198 from near the Cedar City end southwest via Iron Mountain to the Dixie National Forest in the direction of Pinto. Both routes were deleted in 1945, and SR-56 was realigned via Iron Mountain, with the portion of SR-198 east of that settlement becoming part of the new route. A 1953 law restored part of the old alignment to the state highway system as State Route 253, from the junction west of Cedar City to Desert Mound, and also created State Route 254 as a branch to Iron Springs. Both were given back to the county in 1969.
State Route 56 (SR-56) is a 28-mile-long (45 km) route in Washington County in the southwestern part of the state. The route's western origin is at the Mississippi state line at a junction with U.S. Highway 45 and Mississippi Highway 42. The eastern terminus of the route is at Wagerville, where it junctions U.S. Highway 43.
SR-56 was part of US-84 until 1958, when the Coffeeville Bridge opened over the Tombigbee River.
State Route 56 enters Alabama at a junction at the Mississippi state line where Mississippi Highway 42 junctions U.S. Highway 45. The route heads eastward as it approached Chatom, the county seat of Washington County. East of Chatom, the route passes through rural areas until it reaches its eastern terminus at Wagarville. The route is aligned along a two-lane road for its entirety.
The entire route is in Washington County.