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I-5 North County Enhancements Project

Santa Clarita, which is now the third-largest city in Los Angeles County, 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. To prepare for this increase and relieve congestion in the Santa Clarita Valley, Metro and Caltrans District 7, will be making 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 Rd in Castaic.

The enhancements include:

·      Addition of high occupancy vehicle (HOV)/carpool lanes in each direction along I-5

·      Extension of the northbound truck lane from Gavin Canyon undercrossing to Calgrove Bl off-ramp

·      Addition of southbound truck lane from Calgrove Bl on-ramp to SR-14

·      Addition of auxiliary lanes (additional outside lanes extending between an on-ramp and a subsequent off-ramp).

These improvements will enhance safety on the freeway by removing trucks from the general-purpose lanes (GPLs) and increasing access for merging.

The new lanes are expected to provide a much faster and smoother driving experience in the area for locals and travelers. These improvements are part of a multi-phase program identified in Metro’s Long Range Transportation Plan as I-5 North Capacity Enhancements.



  • Concluded Project Design: April


  • Invitation For Bid (IFB) Construction Contract: Fall


  • Anticipated Notice To Proceed (NTP): Spring
  • Anticipated Construction Begins: Summer


  • Anticipated End of Construction

Construction Notices

Start Date Notice Brief More Info