Waymo, a leading developer of self-driving technology, has initiated a voluntary recall of nearly 3,800 robotaxis across the United States. The recall addresses a critical software issue that could potentially allow its autonomous vehicles to drive into flooded roadways. This action comes after an incident on April 20 in San Antonio, Texas, where an empty Waymo vehicle entered a flooded road and was subsequently swept into a creek. The affected vehicles utilize the company’s fifth and sixth-generation automated driving systems.

Responding to the incident, Waymo, which is owned by Google’s parent company Alphabet, emphasized that safety remains its paramount concern. The company confirmed it is actively developing “additional software safeguards” to prevent similar occurrences. Furthermore, Waymo stated that “mitigations” have already been implemented, including restricting access to areas prone to flash flooding. While its San Antonio service remains temporarily suspended, Waymo has committed to resuming public rides once the necessary software updates have been fully deployed. The company currently facilitates over 500,000 trips weekly in various US cities, including San Francisco, Austin, and Miami, and has ambitions to launch a robotaxi service in London by September.

The incident highlights ongoing discussions surrounding the operational limits and safety protocols of autonomous vehicle technology. Jack Stilgoe, a professor of science and technology policy at University College London, pointed out that all self-driving systems inherently have boundaries regarding safe operation, which often become apparent only when problems arise. As more autonomous vehicles are integrated into daily life, he suggests that a greater number of such challenges are likely to emerge, underscoring the importance for policymakers to address these issues proactively rather than reactively. This Waymo recall also follows a series of other safety and operational concerns in the autonomous vehicle sector over the past year, including a widespread power outage in San Francisco that immobilized Waymo taxis and a significant Apollo Go robotaxi outage in Wuhan, China, which left hundreds of self-driving cars stranded in traffic.