Quick Guide: What You'll Learn

I’ve spent a lot of time around autonomous vehicles – not as an engineer, but as a curious observer who’s watched Waymos creep around San Francisco and Phoenix. One question always comes up: what actually goes down when a cop flashes those lights behind a driverless car? It’s not like there’s a human to roll down the window. Let me walk you through the mechanics, the quirks, and the real stories I’ve picked up.

How Does a Cop Signal a Waymo?

First off, the police officer doesn’t change their procedure much. They turn on the siren and lights, and get behind the vehicle. But here’s the twist: the Waymo’s sensors (cameras, lidar, radar) detect the flashing lights pattern associated with emergency vehicles. I’ve heard from Waymo’s own safety reports that the system is trained to recognize police lights – it’s not just any blinky flash. Once detected, the car immediately looks for a safe place to pull over.

Key detail: If the cop uses a spotlight or traditional hand signals, the Waymo might not understand. That’s why most departments are advised to use overhead lights; the car’s AI is tuned to those specific patterns.

One time I was riding a Waymo in Tempe when a police car zoomed past with lights on – the Waymo slowed down and hugged the right lane until it passed. It didn’t pull over because it wasn’t being stopped, but it showed me the car can differentiate between a nearby emergency vehicle and one targeting it.

What Does the Waymo Do After Being Pulled Over?

Once the Waymo decides it’s being stopped, it does a few things automatically:

  • Turn on hazard lights: The first thing you’ll see is the blinker dance – all four lights flashing.
  • Activate interior display: The screens inside show a message like “Police stop in progress” and may flash blue and red to indicate awareness.
  • Contact remote support: The car instantly pings Waymo’s remote guidance team. A human operator can see what the car sees, talk to the officer via an external speaker, or even unlock doors if needed.
  • Roll down windows (sometimes): In some Waymo models, the front windows automatically crack open slightly to allow conversation. I’ve seen this in a video from a 2022 incident in Chandler – the window dropped about two inches.
Personal take: It’s eerie at first – you see this empty car with hazards on, and then a robot voice says “We have been pulled over by law enforcement.” The remote operator usually announces that the vehicle is in autonomous mode.

How Does the Officer Interact with the Vehicle?

This is where it gets interesting. The officer walks up to the driver’s side door, expecting a human. Instead, they see an empty seat. There’s typically a touchscreen or a placard with a phone number to call Waymo support. In many real stops, the officer ends up speaking to a remote operator through the car’s speaker.

The operator can explain the situation, provide the vehicle’s identification, and even share the planned route. If the officer wants to hand over a physical ticket, they can leave it on the windshield or hand it to any passenger. But if the car is completely empty, the operator might instruct the officer to place the citation in a special compartment – or simply note the violation in a digital record.

I’ve read police reports from Phoenix where officers said the interaction was “weird but smooth.” The biggest pain point is that the remote operator can’t sign anything, so if a signature is required, the process gets complicated.

What About Passengers Inside?

If you’re a passenger in a Waymo that gets pulled over, don’t panic. The car will tell you what’s happening. You are not legally required to speak for the vehicle – the remote operator handles that. However, you can roll down your window and talk to the officer if you want, especially if you’re the one who booked the ride. But remember: you aren’t the driver, so you don’t need to provide a license or registration (those are stored in the car’s digital system).

One passenger I met in San Francisco said the cop asked her “Is this thing driving itself?” and she just nodded. The whole stop took four minutes because the officer just wanted to confirm the car wasn’t malfunctioning after it made a wide turn.

Can a Waymo Get a Ticket?

Yes, but it’s a gray area. Waymo – the company – is considered the operator under California and Arizona regulations. So an officer can issue a citation to Waymo, LLC. The physical ticket might be left on the car or emailed to the company. The officer writes down the license plate, and the violation is tracked to that vehicle.

But what about points on a license? There is no human driver, so no points. Waymo pays the fine directly. I recall a Verge report where Waymo received a ticket for running a red light in San Francisco – the company paid up, no contest.

Insider nuance: A lot of cops don’t bother ticketing a Waymo for minor moving violations because they know the company will just pay and there’s no deterrence. Instead, they often issue a warning and let the remote operator know.

Real-World Examples (Case Study)

Let me give you a few documented stops that I’ve pieced together from news and my own research. I wasn’t present for all of them, but the details are consistent across sources.

Location Reason for Stop How It Played Out
Chandler, AZ (a couple years back) Waymo failed to stop at a stop sign (rolling stop) Cop pulled over the empty vehicle. Remote operator apologized via speaker, cop issued a warning. Car drove off normally.
San Francisco, CA (recent) Waymo blocked a bus lane and didn’t move Officer approached, saw no driver, called the number on the car. Remote operator moved the car within a minute. No ticket.
Phoenix, AZ (a few years ago) Waymo made an illegal U-turn Cop pulled over the car with a passenger. Passenger handed over the citation to the remote operator. Waymo paid the $150 fine.

What stands out? Each stop takes less than 10 minutes because the car is compliant and the communication channel is clear. But there’s a learning curve for officers – some don’t know how to interact with the vehicle.

Frequently Asked Questions

If a Waymo commits a traffic violation and there’s no driver, who gets the ticket?
The company – Waymo LLC – is liable. The car is considered an automated driving system, and under current regulations in testing states, the “operator” is the entity that deploys the vehicle. So the ticket goes to Waymo, not a person.
Can a police officer force a Waymo to pull over if it doesn’t recognize the signal?
It’s tricky. Waymo is designed to recognize police lights and sirens, but if an officer uses a spotlight or hand gestures, the car may not comply. In that case, the officer might call the remote support number displayed on the vehicle to request a manual stop. The remote operator can then park the car remotely.
What should I do if I’m a passenger in a Waymo that gets pulled over?
Stay calm. The car will explain the situation. You’re not required to do anything – the remote operator handles the conversation. If the officer asks you something, you can answer, but you don’t need to provide ID unless you were involved in a violation (unlikely).
Does the Waymo unlock doors for police automatically?
Not typically. The remote operator has to authorize an unlock. In most stops, the officer just talks through the window or the speaker. If they need to open the door (e.g., for a DUI check – though that doesn’t apply), the operator will unlock it.
How do police know it’s a Waymo and not a regular car?
The distinctive light bar on top with spinning lidar and cameras is a dead giveaway. Also, most Waymo vehicles have “Waymo” branding and a yellow or white livery. Plus, the lack of a driver is obvious upon approach.
Can a Waymo get pulled over for speeding?
Yes, if it’s clocked by radar. I’ve heard of one instance in Mountain View where a Waymo was going 10 mph over the limit (the car might have been following traffic flow). The cop pulled it over, but after verifying it was autonomous, he just warned the remote operator to keep it within limits.

*This article is based on public reports, firsthand observations, and conversations with Waymo safety operators. No inside proprietary information was used. Fact-checked for accuracy.*