The Los Angeles County Board of Supervisors decided in mid-1916, at the urging of the Harbor Truck Highway Association (formed mid-1914), to build a Harbor Truck Boulevard stretching about 10 miles (15 km) between Los Angeles and Compton, intended to be used by trucks to the Port of Los Angeles at San Pedro. After that portion was completed, an extension to Wilmington was opened on February 2, 1924, resulting in a completely independent truck route to the port. This roadway, which lay about halfway between Wilmington Avenue and Long Beach Boulevard, extended the existing Alameda Street, which ran along—to Slauson Avenue—and then west of the Southern Pacific Railroad's San Pedro Branch to Oris Street, the north limit of Compton. The truck boulevard continued along the west side to Dominguez Street (lying between the SP's San Pedro Branch and Pacific Electric Railway's Dominguez Line beyond Dominguez Junction), and crossed there to the east side for the rest of the route to Anaheim Street in Wilmington. There trucks could turn east and south to Terminal Island via Henry Ford Avenue, or continue southwest through Wilmington to San Pedro. The highway soon came to be known as Alameda Street all the way to Wilmington. It did not become a state highway; instead the state took over Figueroa Street (SR 11) to the west and Atlantic Avenue (SR 15) to the east.