Waymo’s Robotaxis and Flooding Issues
Waymo’s robotaxes have been facing significant challenges, as evidenced by recent events. A software patch intended to prevent robotaxes from driving into floods was ineffective, leading to service disruptions in five US cities: Atlanta, Austin, Dallas, Houston, and San Antonio.
Background:
- On May 21st, Waymo suspended services across the affected cities after the software update failed to stop a robotaxi from getting stuck in a flooded street in Midtown Atlanta during severe storms.
- The company has also suspended freeway rides in San Francisco, Los Angeles, Phoenix, and Miami while addressing performance issues in construction zones.
Technical Flaw:
The underlying problem is architectural, as highlighted in a letter to the National Highway Traffic Safety Administration (NHTSA). The software flaw allows vehicles to reduce speed but lacks a hard-stop condition for water in their path, potentially leading to them driving into standing water or flooding.
Recall and Updates:
Waymo issued a voluntary recall for 3,791 robotaxis using its fifth and sixth-generation automated driving systems due to this issue. An interim software update was provided but proved insufficient to prevent the Atlanta incident. The company acknowledges that the permanent fix is still under development.
Previous Recalls:
This isn’t Waymo’s first recall. Since February 2024, they have had three recalls addressing different issues:
- One for vehicles striking improperly towed vehicles in Phoenix.
- Another for low-speed collisions with stationary barriers like parking gates and telephone poles (May 2025).
Ongoing Investigations:
Two active NHTSA investigations are also underway, one related to a January incident where a Waymo robotaxi struck a child.
Safety Concerns:
Waymo emphasizes safety as its top priority, stating they closely monitor weather conditions and forecasts. However, the frequency of recalls and incidents raises questions about their autonomous driving systems’ reliability and safety measures.