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California State Route 133
State Route 133 (SR 133) is a state highway in the U.S. state of California. It connects SR 1 in Laguna Beach through the San Joaquin Hills with several freeways in Irvine, ending at the SR 241 toll road in the latter city. The portion north of SR 73 in Laguna Beach is part of the California Freeway and Expressway System, and it is built as an expressway from SR 73 to Laguna Canyon Road (just south of I-405 in Irvine). SR 133 is a freeway (the Laguna Freeway) to I-5, and a tollway (part of the Eastern Toll Road) to SR 241 near the Santa Ana Mountains.
SR 133 was constructed as a county road by the 1910s; the portion from I-405 to I-5 was upgraded to a freeway four decades later. Plans to extend the freeway south were canceled by the state, and the southern part of the road remains an undivided highway. In 1998, the majority of the Eastern Transportation Corridor opened, and the connector between I-5 and SR 241 was designated as a toll extension of SR 133.
==Route description==
State Route 133 begins at the Pacific Coast Highway (SR 1) as Broadway in Laguna Beach, a block from the Pacific Ocean. The name changes to Laguna Canyon Road as the highway leaves downtown Laguna Beach and enters Laguna Canyon, soon narrowing to one lane in each direction. After entering the canyon, which lies between Laguna Coast Wilderness Park (west side of SR 133) and Aliso and Wood Canyons Wilderness Park (east side of SR 133), the first major intersection is with El Toro Road (County Route S18). SR 133 widens to four lanes and becomes a highway after its interchange with the San Joaquin Hills Toll Road (SR 73).〔Google Maps street maps and USGS topographic maps, accessed December 2007 via (ACME Mapper )〕
As it continues through the Laguna Coast Wilderness Park, SR 133 follows a four-lane alignment on the west side of the canyon, moved from the old two-lane road in the center of the canyon in late 2006. Laguna Canyon Road splits to the northwest where the canyon ends in Irvine. North of the park, the highway becomes the Laguna Freeway after crossing an at-grade intersection with Laguna Canyon Road, followed by an interchange at exit 8, San Diego Freeway (I-405). SR 133 then continues as a freeway and serves Barranca Parkway and the Santa Ana Freeway (I-5). After crossing I-5, SR 133 becomes part of the Eastern Toll Road along the northwest side of Marine Corps Air Station El Toro, crossing an interchange with Irvine Boulevard at exit 12 before ending at SR 241.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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