It is unusual among Southern California roadways to be built to freeway standards. South of Interstate 10, La Cienega was built to freeway standards in the late 1940s as part of the proposed "Laurel Canyon Freeway", part of State Route 170. The SR 170 freeway was never completed south of U.S. Route 101, and the stretch of La Cienega from just north of Fairview Blvd in Inglewood, through Baldwin Hills and along the Kenneth Hahn State Recreation Area to Obama Boulevard in Los Angeles is a divided, limited access highway with few traffic signals. As such, emergency call boxes like those found along the area's freeways were installed along that stretch in the early 1970s.