Portal:California roads/Selected article/19

State Route 54 (SR 54) is a state highway in San Diego, California that connects Interstate 5 (I-5) in Chula Vista and National City to the city of El Cajon. The westernmost part of the highway is a freeway, intersecting with I-5, I-805, and SR 125; the part of the highway east of SR 125 is undivided, and portions are maintained by the county. The first section of the freeway opened in 1963, east of I-805. The extension of the freeway west to I-5 was delayed because a flood channel for the Sweetwater River was built with the extension. While construction started in 1984, a court stopped the process for a few years, and this portion was not complete until 1992. The final section of freeway, which was upgraded from an expressway, opened in 2007, to coincide with the extension of SR 125 south to Otay Mesa.