The crash was reported on westbound highway 92 east of Half Moon Bay near Pilarcitos Creek Road at about 1:15 p.m., CHP Officer James Evans said.
An overturned vehicle was blocking the westbound lane, Evans said.
No one was injured in the crash, though one-way traffic was being directed through the area, causing backups in both directions, Evans said.
A Sig-alert was issued at 2:14 p.m.
