KEY POINTS
  • At least seven Cruise vehicles blocked traffic by clustering in an intersection in San Francisco starting late Tuesday night, blocking traffic.
  • Photos and a description of the Cruise robotaxis blocking several lanes of traffic in San Francisco were shared Wednesday on Reddit and Twitter.
  • The incident is another example of the difficulty of deploying fleets of self-driving vehicles.
A robot car of the General Motors subsidiary Cruise is on a test drive.

Automotive and tech executives have long promised that autonomous vehicles would drive better than humans, but that wasn't the case for a fleet of Cruise cars in San Francisco this week.

The company, a majority-owned subsidiary of General Motors, confirmed it had an "issue earlier this week that caused some of our vehicles to cluster together." A company spokesman said the problem was "resolved and no passengers were impacted," but declined to give further details.