Google self-driving car strikes bus on California street

LOS ANGELES -- A self-driving car being tested by Google struck a public bus on a Silicon Valley street, a fender-bender that appears to be the first time one of the tech company's vehicles caused a crash during testing.

Google accepted at least some responsibility for the collision, which occurred on Valentine's Day when one of the Lexus SUVs it has outfitted with sensors and cameras hit the side of the bus near the company's headquarters in Mountain View, California.

No one was injured, according to an accident report Google wrote and submitted to the California Department of Motor Vehicles. It was posted online Monday.

According to the report, Google's car intended to turn right from a major boulevard when it detected sandbags around a storm drain at the intersection.

The right lane was wide enough to let some cars turn and others go straight, but the Lexus needed to slide to its left within the right lane to get around the obstruction.

The Lexus was going 2 mph when it made the move and its left front struck the right side of the bus, which was going straight at 15 mph.

The car's test driver -- who under state law must be in the front seat to grab the wheel when needed -- thought the bus would yield and did not have control before the collision, Google said.

While the report does not address fault, Google said in a written statement, "We clearly bear some responsibility, because if our car hadn't moved there wouldn't have been a collision."

Chris Urmson, head of Google's self-driving car project, said he believes the Lexus was moving before the bus started to pass.

"We saw the bus, we tracked the bus, we thought the bus was going to slow down, we started to pull out, there was some momentum involved," Urmson said.

He acknowledged Google's car had some responsibility, but it was "not black and white."

The Santa Clara Valley Transportation Authority said none of the 15 passengers or the driver of the bus was injured.

An internal investigation by the transit agency was ongoing and "no determination of liability has been made," spokeswoman Stacey Hendler Ross said in a statement.

There may never be a legal decision on liability, especially if damage was negligible -- as both sides indicated it was -- and neither Google nor the transit authority pushes the case.

Still, the collision could be the first time a Google car in autonomous mode caused a crash.