One car got stuck in it earlier, and has been removed. The left lane is closed indefinitely.
The San Francisco CHP posted these pictures on twitter. Caltrans crews are en route to the scene.
The two other lanes at the bottom of the off-ramp remain open.
***TRAFFIC ADVISORY ALERT***— CHP San Francisco (@CHPSanFrancisco) February 25, 2021
I-280 n/b @ 6th Street off-ramp will be closed due to large sink hole near bottom of elevated off-ramp.
Caltrans crews enroute and unknown ETO. pic.twitter.com/soe9XnYddX