Alphabet’s Waymo is recalling 3,871 robotaxis equipped with its Fifth Generation Automated Driving System.

The National Highway Traffic Safety Administration (NHTSA) warned that a software flaw could cause vehicles to enter closed freeway construction zones without reducing speed.

Waymo has voluntarily restricted its fleet from freeway operations while implementing a solution. The company is deploying a free, over-the-air software update to improve location detection and construction zone avoidance.

Waymo proactively notified regulators after identifying performance issues in these specific environments.