CARLSBAD - Authorities issued a Sig Alert Wednesday after a crash shut down lanes on south Interstate 5 between Cannon Road and Tamarack Avenue.
The incident was reported at 6:45 a.m. Initial reports indicate that the crash involved a big rig and a pickup truck pulling a trailer.
As of 7:15 a.m., at least three lanes were blocked and only one lane was open.
All lanes were reopened at 9:00 a.m., but traffic remained heavy.
The Sig Alert was canceled at 9:19 a.m. and traffic was reported to be flowing smoothly.