WOODLAND HILLS—A big rig truck overturned on Westbound 101 at Topanga Canyon Boulevard on December 17. The accident resulted in on only one left lane being open to motorists as officials conducted their investigation.

“Left 3 lanes are OPEN while CalTrans repairs damaged guardrail after big rig crash. Traffic is moving but slow through the area,” the CHP tweeted nearly 3 hours after the crash was first reported. No details were provided on any injuries during the incident.