Join the Historic Highway 99 Association of California for a presentation on the history of US 99 and the Newhall Pass on September 14, 2021 at 6pm via Zoom. The history of the roadway will be covered from the Newhall Tunnel in 1910 to the HOV ramp at the I-5 / State 14 interchange in 2012. Q&A to follow the presentation. Please register using the link below.
https://us06web.zoom.us/meeting/register/tZcrc–rpzIoGdxQYOYkViOpSZQHqw2rEpl1
In 1955, the first section of the Golden State Freeway opened. It was a short section, running from near Weldon Summit to Foothill Blvd. The freeway was the first major attempt to improve traffic in the Newhall Pass area and it did help for a time. The freeway remained until the early 1970’s when the new I-5 / State 14 interchange was constructed and the old freeway was reconfigured to become the “Truck Lanes”.
Today, the original interchange still remains, though not entirely used. The lower level, formerly the US 6 West to US 99 South connector, is now partially filled in. The second level still carries Sierra Highway with the top level carrying the I-5 Truck Lanes. The Newhall Pass has undergone many changes in its time as a transportation corridor for Los Angeles. This one was but one of those. The photo was taken on November 22, 1955.
To commemorate the 50th anniversary of the February 9, 1971 M6.6 Sylmar / San Fernando Earthquake, our featured image shows the construction work in progress on the I-5 and State 14 interchange in 1970. This work would be halted abruptly in the early hours of February 9, 1971. After this, it would be reconstructed two more times. The earthquake changed the way freeways such as this were built and did further seismic codes throughout the state.
For further information about the interchange: