Three models in scope
TIER IV and Komatsu have begun joint development of autonomous driving systems for dump trucks across three models used at quarry and construction sites. The models are the rigid HD785, with a maximum payload of 93.9 metric tons, the rigid HD605 at 64.1 metric tons, and the articulated HM400/460 at 42 metric tons.
The systems are to combine TIER IV's autonomous driving technology with Komatsu's vehicle engineering, system integration and vehicle control, and are intended to support loading, hauling and dumping in jobsite operations.
Target date of 2027
The two companies said they are working toward practical use in Japan and North America in 2027. TIER IV, Komatsu and Komatsu subsidiary EARTHBRAIN began collaborating in September 2025 on practical use of autonomous technology for construction equipment, the companies said.
Fleet management layer
Fleet management software developed by EARTHBRAIN is to be integrated with the autonomous driving system, which the companies said would take automation beyond individual vehicles to management of the jobsite fleet as a whole. The partners plan verification testing and deployment at jobsites to build operating experience, with the stated aim of improving labor efficiency and contributing to jobsite safety and productivity.
