# US safety agency investigates comma.ai driver-assistance devices after crashes

_Published Wednesday, September 23, 2026 at 12:04 PM EDT · Policy, Products · Latest · Tier 1 — Major_

![two cars drive on a bridge, seen from above. One is bounded by a green box, one by a red box — Primary](https://cdn.arstechnica.net/wp-content/uploads/2026/09/GettyImages-1572803728-2560x1440.jpg)

The National Highway Traffic Safety Administration has opened an investigation into aftermarket driver-assistance devices made by comma.ai after learning of five crashes involving vehicles that struck stopped or slow-moving cars while drivers used the devices. The agency says two of those crashes caused three deaths, and four of the five crashes injured 11 people.

The devices augment a vehicle's existing driver-assistance system. The investigation brings the company's products under federal scrutiny, but the reported crashes alone do not establish that a device defect caused them.

## Sources

- [Ars Technica](https://arstechnica.com/cars/2026/09/aftermarket-driver-assist-under-federal-probe-following-fatal-crashes/)

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Canonical: https://techandbusiness.org/newswire/CajMwJm4oB-ZjhtUCToDGZ
Published: 2026-09-23T16:04:26.717Z
Story chronology: 2026-09-23T14:20:23.000Z
Retrieved: 2026-09-23T17:50:38.178Z
Publisher: Tech & Business (techandbusiness.org)