Historical Tour of US 6 / US 99
US 6 / US 99 Junction
The Tunnel Station Viaduct, as it is known, was originally built in 1911 by the City of Los Angeles. The structure was later widened in 1936 to its current form. While somewhat modified in the intervening years through the removal of the light posts and seismic retrofitting, the bridge still retains some of its unique features. The railing and sides have an Art Deco look to them, common for bridges in the Los Angeles area from that era.
In 1930, the Newhall Alternate was completed between Tunnel Station (here) and Saugus Junction bypassing Newhall and Saugus. This greatly improved traffic conditions at Tunnel Station Junction, however, it was not to last. 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. After US 6 was extended here in 1937, traffic heading up to the Eastern Sierra increased, again creating traffic jams here.
In 1954, the first segment of the Golden State Freeway was completed through here, bypassing the old junction. It ran from the San Fernando Road / Sepulveda Blvd junction to near the top of Weldon Summit. A three level interchange was constructed to help alleviate the congestion 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 West to US 99 South 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. The original freeway portion, albeit modified heavily, is still in use today as the I-5 Truck Lanes.
- Additional historic photos of the US 6 / US 99 interchange
- Information on the I-5 / SR-14 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 to Los Angeles
Go East on Foothill Blvd. (LR 157 and SR-118) to Pasadena