A two-vehicle fatal collision on the border of Menlo Park and Palo Alto this morning left a woman dead and blocked both eastbound lanes of Sand Hill Road for hours, authorities said.
Two compact cars collided shortly after 9:30 a.m. in the area of Sand Hill Road and Saga Lane.
Multiple agencies responded, including the Menlo Park police and the Menlo Park Fire Protection District, and the Palo Alto Fire Department, Palo Alto fire Battalion Chief Chris Jackson said.
The collision sent the first vehicle into the driveway of the SLAC National Accelerator Laboratory at 2575 Sand Hill Road, Chief Jackson said.
A passenger in that car was pronounced dead at the scene, he said.
The victim's daughter had been driving and the driver's child was in the car as well, but neither was seriously injured, he said.
The sole occupant of the other car was also not seriously injured, Jackson said.
Both eastbound lanes of Sand Hill Road remained blocked until shortly before 1 p.m., Menlo Park fire Deputy Chief Tim Campbell said.
The cause of the crash remains under investigation.