 The actual road, however, runs from the California State Capitol (at 15th Street) in Sacramento to the city of Auburn in Placer County and has various changes of name along the way, which includes Capitol Avenue (old M Street), Folsom-Auburn Road and Auburn-Folsom Road.For much of the route, it runs nearly parallel with U.S. Route 50 and was that highway's alignment before the freeway was completed in the 1970s.Folsom Boulevard begins in the East Sacramento neighborhood (in a southeasterly direction) as a two-lane roadway, expanding to four lanes at 59th Street.