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I-5 Improvements in North County

The project includes operational and capacity enhancements along the Interstate 5 (I-5) freeway in the northern part of Los Angeles County from the State Route 14 (SR-14) interchange in Santa Clarita to just south of Parker Road in Castaic.  The improvements include the addition of high occupancy vehicle (HOV)/carpool lanes along the median, additional or maintaining of truck lanes, and auxiliary lanes (additional outside lanes extending between an on-ramp and a subsequent off-ramp).  These improvements will enhance capacity, operations, and safety by removing trucks from the mixed-flow lanes, enhancing merge-weave areas, and adding a lane dedicated to HOVs.

The Los Angeles Metropolitan Transportation Authority (Metro), in cooperation with Caltrans District 7, is conducting the final design for the proposed improvements.  These improvements are part of a multi-phase program identified in Metro’s Long Range Transportation Plan as I-5 North Capacity Enhancements. The design phase will occur from Summer 2016 to Winter 2018, with construction estimated to occur Spring 2019 through Winter 2022.

On the northbound side of I-5, two enhancements are being developed. First, existing I-5 HOV lanes, which run from the San Fernando Valley to the south, will be extended north from their current termination at SR-14 to just south of Parker Road, providing continuous HOV carpool lanes on I-5 through the Santa Clarita Valley.  Second, auxiliary lanes will be completed between Calgrove Blvd and Pico-Lyons, and between Valencia Blvd and Magic Mountain Parkway.  Two enhancements are also being developed for the southbound I-5.  These include: an additional truck lane added from Pico Canyon Road-Lyons Avenue to SR-14, and auxiliary lanes added from SR-126 to Rye Canyon, Rye Canyon to Magic Mountain Parkway, and Valencia Blvd to McBean Parkway.

The new lanes will add capacity to the I-5 freeway through Santa Clarita, which is now the third largest city in Los Angeles County and is expected to increase its population by more than 25,000 people by 2035 as documented in the City of Santa Clarita’s “One Vision One Valley” Plan. The new lanes are expected to provide a much faster and smoother driving experience in the area for locals and travelers.

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