An hours-long traffic jam in San Francisco on Saturday July 4 was partly the result of stalled Waymo vehicles, the autonomous car company has confirmed. A Waymo spokesperson confirmed to Mashable that the city's 4th of July celebration at the Golden Gate Bridge led to traffic disruptions, a high volume of travelers, and unexpected road closures nearby. While some of the autonomous vehicles remained operational, others ran out of charge while idling and were towed as a result.