The westbound 10 Freeway transition to the 110 Freeway will be closed for several hours after a crash, affecting the Thursday morning commute.
The California Highway Patrol issued a Sig Alert saying officers and crews from Caltrans are on the scene working to clear the roadway.
According to the CHP, a vehicle hit the impact attenuators in the middle of the roadway, causing sand to spread out around 2:46 a.m.
No injuries were reported.