Historical Tour of US 6 / US 99
US 6 / US 99 Junction – Tunnel Station
The Tunnel Station Viaduct, as it is known, was originally built in 191. The structure was later widened in 1936 to its current form. The bridge was built as a part of the Ridge Route by the City of Los Angeles. Prior to 1930, there was no intersection here. In 1930, the Newhall Alternate was completed between Tunnel Station (here) and Saugus Junction bypassing Newhall and Saugus. US 6 was extended here in 1937. In 1934, Foothill Blvd was extended here, functioning as a bypass of Los Angeles, much like I-210 does today diverting traffic bound for Pasadena.
Traffic was snarled here for many years before the new three level interchange was built at the US 99 and US 6 junction. In 1954, a segment of the Golden State Freeway was completed. It ran from the San Fernando Road / Sepulveda Blvd junction to near the top of Weldon Summit. This photo shows the three level interchange that was once in use here. Starting from the top, US 99 is on the top level, US 6 is on the middle level, and a ramp from US 6 to US 99 is on the third level.
This interchange was in use until the modern interchange between I-5 and SR-14 was built in 1971. That interchange had to be rebuilt due to an earthquake on February 9, 1971. It was finally completed in 1975. In 1994, the I-5/SR-14 interchange was rebuilt yet again after two of the bridges collapsed.
Historic photos of the US 6/US 99 interchange
Go East on US 6 and North US 99 (1926-1930)
Go North on US 99 to Bakersfield
Go South on US 99 / West US 6
Go East on Foothill Blvd. (LR 157 and SR-118) to Pasadena
Return to US 99 Introduction Page