Welcome to L.A. Street Names, the origin stories of street names across Los Angeles County, from the shortest cul-de-sacs to the longest boulevards. Mysteries solved, myths debunked, scandals exposed, history revealed. This is an ongoing project with more than 2,100 streets – and growing. See FAQ for more information.
Featured Major Street
Arroyo Seco Parkway
Freeways don’t really belong in this assessment of L.A. street names, but the Arroyo Seco – Spanish for “dry creek bed” – deserves a mention. Long before pavement and automobiles, the “Arroyo Seco Road” was named by 1855 and possibly much earlier. Decades later, it was transformed into America’s first freeway, built at a cost of $6 million and officially dedicated on December 30th, 1940. (Its original speed limit, 45 mph, explains those startling 5 mph off-ramps!) It was designated State Route 110 in 1981. The Arroyo Seco Parkway is a segment of another notable road: Route 66.
