US federal regulators have opened or expanded an investigation into Waymo’s autonomous vehicles following continued incidents involving stopped school buses. Wired reports that Waymo previously recalled software after some autonomous cars drove around stopped buses, but the issue persisted, prompting the federal government to seek more information.

Multiple outlets say the probe centers on whether a 2025 software update and voluntary recall effectively addressed the school-bus safety problem. The Independent frames the question as taxis continuing to pass stopped school buses despite Waymo’s announcement of a voluntary recall. Quartz and Engadget add that the investigation follows concerns raised after the software fix, with Quartz citing regulatory detail about reported incidents.

Across coverage, the core points converge: the federal probe relates to school-bus safety violations, Waymo had already taken corrective action through a recall tied to software, and regulators are now assessing whether the fix worked as intended. The main differences lie in how much specific regulatory methodology or incident timing each outlet highlights.