Waymo, the autonomous driving subsidiary of Alphabet, has issued a recall for its fleet of nearly 4,000 robotaxis operating in the United States. The recall follows the identification of at least 13 separate incidents where the company's self-driving vehicles entered highway sections that were clearly closed for construction work. These incidents occurred across Phoenix, Arizona, and San Francisco, California, prompting Waymo to voluntarily restrict its vehicles from all highway operations.
The issues surfaced in mid-April in Phoenix, where Waymo robotaxis reportedly failed to recognise and drove past ramp closure signs into pre-planned freeway construction zones. Following an internal review, Waymo's Field Safety Committee initially restricted freeway operations in Phoenix. Further incidents in the San Francisco Bay Area on May 18, where seven robotaxis drove into active construction lanes, led to the company suspending all freeway driving for its entire fleet the following day. Waymo informed the National Highway Traffic Safety Administration (NHTSA) that its software was either 'prioritising the avoidance of other freeway hazards and/or failing to recognise the construction zone.'
This marks the sixth recall for Waymo's robotaxis, highlighting ongoing challenges in the development of fully autonomous driving systems, particularly concerning 'edge cases' – unusual or unexpected scenarios that test the limits of AI decision-making. Previous recalls addressed issues such as driving into flooded roads, illegal behaviour around school buses (an incident that led to an investigation by NHTSA and the National Transportation Safety Board after a robotaxi struck a child), low-speed collisions with chains, gates, and telephone poles, and problems related to towed trucks.
While Waymo states that its vehicles have accumulated over 170 million autonomous miles and claim a significant reduction in serious-injury crashes compared to human drivers, these recalls underscore the complexities of deploying such technology safely. The company has proactively notified state and federal regulators and is now developing a software update to rectify the problem, though its vehicles continue to operate on surface streets. Footage of some of these incidents has been shared on social media, with one user claiming a Waymo vehicle 'blasted through cones' and was 'chased' by police, leading to passenger distress.
The incident comes as Waymo embarks on an ambitious expansion plan, intending to launch services in more than 20 cities this year, including potential future operations in international hubs like London and Tokyo. This rapid expansion inevitably brings its software into contact with a broader range of real-world scenarios, exposing areas where further refinement is needed. The company's safety board made the decision to issue the recall on June 8, with a fix for the problem 'currently under development.'
For UK businesses and consumers, the challenges faced by Waymo offer valuable insights into the nascent autonomous vehicle industry. While the UK has its own regulatory frameworks, such as those overseen by the Department for Transport and the Vehicle Certification Agency, these international incidents highlight the critical need for robust testing and continuous software improvement before widespread adoption. The development of self-driving technology promises significant economic benefits, including improved logistics efficiency and potentially safer roads, but the journey to fully autonomous and safe vehicles is clearly complex and iterative.
Source: National Highway Traffic Safety Administration (NHTSA)