Altadena, CA – Two-Vehicle Crash on I-5 N/Colorado St On-Ramp Leaves Injuries

Altadena, CA (September 18, 2025) – A two-vehicle crash on I-5 northbound near the Colorado Street on-ramp resulted in injuries on Thursday evening, September 18.

The California Highway Patrol said the accident occurred around 5:27 p.m. Two vehicles collided while merging onto the freeway, leaving both cars with significant damage. Officers confirmed that multiple individuals sustained injuries, with at least one victim transported to a local hospital for further treatment. Others were treated on-site. The crash disrupted evening traffic, with several lanes blocked until authorities cleared the vehicles.

CHP worked quickly to investigate the crash and ensure traffic flow was restored before nightfall. Investigators are reviewing driver statements and nearby surveillance footage to determine what led to the collision.

We wish a full and speedy recovery to those injured in this accident.

If you’ve been hurt in a crash on I-5, you don’t have to face the aftermath alone. Call our skilled Los Angeles car accident lawyer today at (888) 511-4558 to discuss your options for compensation and justice.