The miner has been running its 200 trains in autonomous mode with a driver on-board since early in 2017, on its more than 1700km of rail line in WA's Pilbara.
Those trains have been moving iron ore from 16 mines in the region's interior to four port terminals around the Pilbara.
The Autohaul project has been rolled out in phases in the lead up to full commissioning, and more than 3 million kilometres, or 65% of all train kilometres have been completed in autonomous mode.
Rio Tinto expects to unlock significant safety and productivity benefits once the Autohaul project is fully commissioned.
The miner's Pilbara shipments guidance for 2018 remains between 330 million tonnes and 340Mt of iron ore, on a 100% basis, although this is dependent on market cond...