It's messy. On the larger side in places, but it's hard to tell as there's mostly wash and foam for miles. Kept driving and it did get better, but not that much more surfable. Watch out for gnarly looking accident on 280 N just past the 1 interchange.
Details: Three lanes blocked - I-280 North between Westborough Blvd and Pacifica Exit / CA-1 SB 8:18 AM