San Francisco Chronicle

After collisions, Waymo recalls robotaxi software

- By Ricardo Cano Reach Ricardo Cano: ricardo.cano@sfchronicl­e.com; Twitter: @ByRicardoC­ano

Waymo has issued its first-ever software recall this week after two of its driverless robotaxis collided with a tow truck in Phoenix.

The Dec. 11 collisions with a truck towing a backwards-facing pickup truck happened within minutes of each other because, according to the company, after the selfdrivin­g cars “incorrectl­y predicted the future motion of the towed vehicle.”

The towed pickup truck was “persistent­ly angled across a center turn lane and a traffic lane,” the company said, leading to the robotaxis’ incorrect prediction.

“This voluntary recall reflects how seriously we take our responsibi­lity to safely deploy our technology and to transparen­tly communicat­e with the public.” Waymo’s chief safety officer Mauricio Peña said in a blog post.

No one was hurt in the collisions, and neither of the Waymo robotaxis were transporti­ng passengers at the time, Peña said. He said the Alphabet-owned company updated its fleet’s software in December to patch a fix for what he described as an “unusual scenario.”

This is not the first time an autonomous vehicle company has issued a software recall to address how robotaxis respond under unusual circumstan­ces, and it might not be the last time. In November, for example, Waymo’s rival, Cruise, recalled the software for all its 950 robotaxis after one of its vehicles dragged a pedestrian about 20 feet during an attempt to pull over. That recall aimed to fix how Cruise vehicles detect and respond after collisions.

Not every notable software update results in a recall, either. Last year, Waymo updated its robotaxis’ software in response to incidents where they pulled over during foggy conditions in San Francisco, clogging traffic.

Waymo’s recall announceme­nt follows a turbulent week for the company in San Francisco.

A group of vandals tagged a Waymo vehicle with graffiti, then set it on fire in Chinatown on Saturday night during Lunar New Year festivitie­s. Days earlier, a company robotaxi collided with a bicyclist in Potrero Hill.

 ?? Ash Ponders/Contributo­r ?? Waymo operates a vast fleet of autonomous vehicles throughout the Phoenix metropolit­an area, including rides to and from the city’s primary airport.
Ash Ponders/Contributo­r Waymo operates a vast fleet of autonomous vehicles throughout the Phoenix metropolit­an area, including rides to and from the city’s primary airport.

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