„Five self-driving vehicles blocked traffic early Tuesday morning in the middle of a residential street in San Francisco’s Balboa Terrace neighborhood, apparently waylaid by fog that draped the southwestern corner of the city.“ (San Francisco Chronicle, 11 April 2023) The San Francisco Chronicle reported this in an article published on April 11, 2023. The fact that fog is a problem for Waymo’s vehicles has been known to the company for some time. A blog post from 2021 states: „Fog is finicky – it comes in a range of densities, it can be patchy, and can affect a vehicle’s sensors differently.“ (Blog Waymo, 15 November 2021) Against this background, it is surprising that vehicles are allowed to roll through the city unaccompanied, especially since Frisco – this name comes from sailors – is very often beset by fog. But fog is not the only challenge for the sensors of self-driving cars. A thesis commissioned and supervised by Prof. Dr. Oliver Bendel presented dozens of phenomena and methods that can mislead sensors of self-driving cars. The San Francisco Chronicle article „Waymo says dense S.F. fog brought 5 vehicles to a halt on Balboa Terrace street“ can be accessed at www.sfchronicle.com/bayarea/article/san-francisco-waymo-stopped-in-street-17890821.php.

Fig.: San Francisco in April 2023