UPDATE (12/18, 7:07 p.m.): The number 1 and 2 lanes reopened and traffic is no longer being diverted, according to CHP.
Crews are on-scene cleaning up carrot mulch on the roadways.
A semi-truck lost its trailer and blocked traffic on southbound Highway 99, just south of Highway 58 Monday evening.
The trailer became detached just before 6 p.m. and temporarily blocked all southbound lanes of traffic on Highway 99.
Within about 30 minutes, crews were able to move the trailer to the right-hand shoulder but traffic is still currently stopped.
The trailer was carrying carrots which spilled all over the freeway. Hazmat crews and CHP are on-scene cleaning up.
Traffic is being diverted off at Stockdale Highway. Eastbound 58 to southbound 99 is closed.
This is a breaking news story, refresh for updates.