Heidelberg Materials

achieved a milestone in autonomous hauling, reaching the 2-million-ton mark at its Lake Bridgeport Quarry in Bridgeport, Texas.

Following a successful pilot project at Heidelberg Materials’ neighboring Bridgeport Quarry in Chico, Texas, the company equipped a mixed fleet of

Caterpillar

and

Komatsu

haul trucks with

Pronto.ai

’s autonomous haulage system (AHS). The achievement at the Lake Bridgeport Quarry was made in less than eight months, Pronto says.

“We are excited to mark this important milestone at our Lake Bridgeport Quarry,” says Scott Tipping, global director of the competence center for aggregates and asphalt at Heidelberg Materials. “It showcases our strong commitment to scaling innovative solutions that drive operational excellence at Heidelberg Materials.”

From Pronto’s view, the achievement at the Lake Bridgeport Quarry establishes a new commercial standard for operational velocity and flexibility in quarry automation. The operation’s fleet includes Caterpillar 775G rigid-frame haulers working alongside Komatsu HD605-8 and next-generation Komatsu HD605-10 trucks.

The Lake Bridgeport deployment leverages Pronto’s vision-only AHS option, which utilizes cameras and AI to navigate dynamic quarry environments without the need for LiDAR, radar or pre-mapping.

“True scalability in the aggregates industry requires the ability to automate the iron you already own,” says Anthony Levandowski, CEO of Pronto. “By successfully running a mixed fleet of Cat and Komatsu trucks on Pronto AHS, we have proven that autonomy is no longer a ‘one-brand’ luxury. We have unlocked the ability for Heidelberg Materials to optimize their fleet strategy independent of their AHS platform.”

In February 2025

, Heidelberg Materials came to an agreement to deploy Pronto’s AHS to more than 100 trucks operating across company sites worldwide. With the technology validated at production scale, Pronto says the companies are proceeding with the rollout of the AHS to those trucks.

“Our partnership with Pronto not only contributes to enhancing efficiency and safety at our sites, but it also helps us address recruiting challenges while further accelerating our sustainability efforts,” Tipping says. “Building on this achievement, we will continue to expand autonomous haulage to more than a dozen sites in North America, Europe and APAC, further advancing the digitization of the building materials industry.”

Chris Ward, president and CEO of Heidelberg Materials North America, shares Tipping’s excitement over the achievement.

“The successful deployment of Pronto’s AHS technology at Lake Bridgeport showcases our strong commitment to leveraging innovative and scalable solutions at our operations that contribute to enhancing efficiency and safety while also addressing the recruiting challenges we face at many of our operations across North America,” Ward says.

Heidelberg Materials is not the only aggregate producer in the U.S. to announce a milestone regarding tons hauled autonomously. In July 2025, Caterpillar detailed how

Luck Stone reached the 1-million-ton mark

at the Bull Run Quarry in Chantilly, Virginia.

Luck Stone and Caterpillar

embarked on their autonomous hauling journey in 2023.

Related:

Autonomy among 10 trends shaping aggregates in 2026 (podcast)