Livorna Road in Alamo has been reopened following a crash that seriously injured one person, a California Highway Patrol officer said.
The crash was reported shortly before 12:30 p.m. at the intersection of Livorna and Wilson roads, said CHP Officer Scott Cakebread.
One person suffered major injuries and was flown by helicopter to John Muir Medical Center in Walnut Creek, officers said.
The crash was cleared and the road was reopened by 2:12 p.m., CHP Officer Kevin Kroncke said.
Details about the cause of the crash were not immediately available.