Self-driving truck technology company Plus.ai has announced that it successfully completed the first coast-to-coast commercial freight run with an autonomous truck on behalf of Land O’Lakes Inc.

Considered the first L4 U.S. cross-country commercial pilot, the hub-to-hub trip covered 2,800 miles from Tulare, California to Quakertown, Pennsylvania in less than three days, hauling a fully-loaded refrigerated trailer of perishable cargo.

“This cross-country freight run with Land O’Lakes shows the safety, efficiency and maturity of our autonomous trucks, which are already delivering freight for other partners several days a week,” says Shawn Kerrigan, COO and co-founder of Plus.ai.

“Continued advances in our autonomous trucks will make it possible for these quick cross-country runs to be the norm in the future. We are excited to demonstrate what our technology can already achieve today while meeting rigorous autonomous driving safety and food transportation compliance standards.”

The autonomous truck was equipped with Plus.ai’s advanced autonomous driving system, which uses a variety of software and technology including multimodal sensor fusion, deep learning visual algorithms, and simultaneous location and mapping (SLAM) technologies. The company says that the journey was “an important milestone in validating the system’s ability to safely handle a wide range of weather and road conditions.”

The vehicle drove primarily in autonomous mode during the cross-country journey, but a safety driver was on board during the entirety of the journey to monitor and assume control if necessary. A safety engineer was also present to monitor system operations.

“Self-driving and other emerging transportation technologies stand to completely reshape commercial shipping, so we are thrilled to collaborate with technology leaders like Plus.ai to pilot autonomous trucks for our shipping needs,” says Yone Dewberry, Land O’Lakes’ Chief Supply Chain officer.

“End of the year is a very busy time for us. To be able to address this peak demand with a fuel- and cost-effective freight transport solution will be tremendously valuable to our business.”

During the continuous cross-country journey, the Plus.ai autonomous truck safely operated during both the day and night through varying conditions including the expansive plains of Kansas, the winding roads of the Rockies, and at over 11,000 feet elevation. While heading east, the truck also encountered rainy and snowy roads.