A vehicle accident with injuries near the Sycamore Valley Road exit on northbound Interstate 680 has backed up traffic down to Alcosta Boulevard, according to traffic.511.org.
As of 3:55 p.m. the right shoulder was blocked and debris was on the freeway.
Patch will update this story when more information is available.
Were you in the traffic jam? How long did it take you to go through San Ramon and into Danville?
Visit our traffic map at sanramon.patch.com/commute for live traffic conditions.
