An autonomous shuttle operating in Las Vegas has gotten off to a shaky start.

The fully autonomous and electric shuttle was the first to operate on a public street in the U.S. Yesterday was the first day of service for the shuttle, operating on a short route in downtown Las Vegas.

Unfortunately, the service got off to a rocky start. The shuttle, named Arma was struck by a delivery truck. The truck was reversing into a loading dock, but the driver of the truck couldn’t see the shuttle. According to the City of Las Vegas, the shuttle did exactly what it was supposed to do. The sensors registered the possibility of a collision, and the shuttle stopped.

SEE ALSO: Self-Driving Electric Shuttle Bus Testing In Las Vegas

The delivery truck, though, didn’t. It grazed the fender of the shuttle, causing damage. The driver of the truck was cited for the collision.

The shuttle will remain out of service for the rest of the day.

The Las Vegas shuttle is designed and built by a French company called Navya, and has lidar, GPS, and camera sensors. It seats eight passengers and does have an attendant in case of an incident. During the AAA-sponsored test, Navya and AAA will monitor how the riders respond to a driverless vehicle. They will also examine how pedestrians, cyclists, and other cars react to it. The shuttle underwent testing in the city earlier this year.

The shuttle covers a 0.6-mile loop in the Innovation District of downtown Las Vegas. It offers free rides to let people experience autonomous transportation for the first time.