UPDATE (10:50 a.m.) - All lanes of the highway are now open.
___
UPDATE (10:15 a.m.) - One lane of the highway has reopened with one-way traffic control, Caltrans reports.
___
UPDATE (8:40 a.m.) - The CHP has released new information on this crash.
Officials now say the crash turned deadly, involving a big rig and a Nissan Altima.
They say around 6 a.m. on Wednesday morning, the Nissan crossed into the opposite lane of traffic and crashed head-on into the big rig.
Authorities are asking drivers to use alternative routes until lanes can be reopened.
___
(7:04 a.m., Wednesday, March 25) - All lanes on Highway 166 near Pine Canyon Road east of Santa Maria are blocked due to a collision, according to the CHP.
No additional details on the accident have yet been released and an estimated time of opening is unknown. Travelers are advised to use alternative routes.
