California Highway Patrol says an accident shut down parts of Highway 101 overnight.
CHP reported that a truck had been involved in a collision on the southbound side of the highway near Old Stagecoach Road in San Luis Obispo.
It says the crash was reported around 11:15 p.m.
The entire freeway was shut down by 11:45 p.m.
Around 2:40 a.m CHP says one lane of the highway was re-opened.
CalFire responded to the accident alongside the Highway patrol.
UPDATE: CHP reports that both lanes were re-opened around 3 a.m.
