America's road safety regulator, the National Highway Traffic Safety Administration (NHTSA), sent a public warning this week to every company operating self-driving cars. The agency says it has documented a clear pattern of driverless vehicles blocking ambulances, driving into active emergency scenes, and failing to respond to flashing lights, flares, smoke, and traffic cones. Companies have until the end of July to present their solutions.
The agency's administrator, Jonathan Morrison, put it plainly: "An AV that cannot safely interact with first responders is a danger to the general public." He added that, just as human drivers who block emergency vehicles can face fines or jail time, self-driving car companies will be held to the same standard. What the agency did not specify is exactly what happens if companies ignore the deadline or present inadequate plans.
The incidents behind the warning are well-documented. San Francisco's fire chief logged 55 cases of self-driving cars interfering with emergency responses in one year alone. In Dallas, a deputy constable had to physically climb into an empty, driverless Waymo vehicle and drive it away from a burning apartment building where a natural gas explosion had killed three people. During a December power outage, more than 1,500 Waymo cars became confused simultaneously, overwhelming the company's remote support line. A 911 dispatcher reportedly sat on hold with Waymo's emergency hotline for 53 minutes.
Fire chiefs in both San Francisco and Austin told regulators in March that performance has been getting worse, not better. Waymo vehicles have been freezing in front of fire stations and failing to respond to hand signals from officers. The phrase they used was "backsliding."
Waymo is by far the biggest player here. The company operates roughly 4,000 vehicles across more than 10 American cities, completes around 500,000 paid rides per week, and is targeting 1 million weekly trips by the end of this year. It raised $16 billion earlier this year. On the exact same day NHTSA issued its warning, Waymo announced expansion into four more cities: San Diego, Las Vegas, Tampa, and Denver, with London to follow as its first international market.
That collision of news tells you everything about the situation. The industry is growing faster than it is solving its problems. Waymo has trained thousands of first responders on how to interact with its vehicles, which sounds helpful until you realize that first responders should not need a training course to move a car out of the way of a fire truck.
The technical problem is harder than it sounds. Teaching a self-driving system to recognize an emergency scene requires understanding sirens, lights, hand signals, and the unpredictable chaos of an active incident, all at the same time. When a system does not recognize the situation, its default is to stop. Stopping in the middle of an emergency scene is, in many cases, the worst possible response.
Both NHTSA and the National Transportation Safety Board are already investigating separate Waymo incidents, including one where vehicles passed stopped school buses with their lights on, which is illegal, and another where a Waymo struck a nine-year-old child in a school zone.
The NHTSA letter does not define what an acceptable solution looks like, and it does not set formal legal consequences. But the tone is clear, and the pressure is real. For a company valued at $126 billion and planning global expansion, being publicly labeled a danger to emergency services is a problem that goes well beyond one government letter.