TIER IV and Komatsu start building autonomous driving systems for three dump trucks

Nov 13, 2026
The partners aim to deploy self-driving haul trucks at quarries and construction sites in Japan and North America in 2027.

Autonomous driving software company TIER IV and construction equipment maker Komatsu have begun jointly developing autonomous driving systems for three dump truck models, TIER IV announced. They aim to deploy the trucks at quarry and construction sites in Japan and North America in 2027.

The work covers Komatsu's HD785 and HD605 rigid dump trucks, with maximum payloads of 93.9 and 64.1 metric tons, and the HM400/460 articulated dump truck, with up to 42 metric tons. TIER IV brings its autonomous driving technology and Komatsu its vehicle engineering, integration and control, so the trucks can handle loading, hauling and dumping on real job sites. Komatsu subsidiary EARTHBRAIN will connect its fleet management system so the automation covers a whole site rather than single vehicles. The three companies began working together in September 2025.

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