UPDATE: 9:42 a.m.
All lanes along the southbound I-15 in Temecula have reopened. Southbound traffic continues to be backed up, and a traffic advisory is in effect, according to the CHP.
UPDATE: 8:54 a.m.
According to the CHP, the number 2-5 lanes have reopened. The number one lane remains blocked.
A SigAlert was been issued along the southbound I-15 in Temecula this morning after a collision between a big rig and another vehicle has blocked two lanes.
The crash was reported shortly before 8 a.m. just north of Winchester Road. According to CHP, the big rig is jackknifed along the center divider.
The number 1 and 2 lanes of the I-15 have been closed off.
There was no estimate when the sigalert would be lifted.