The Rio Tinto Brockman 4 mine's truck fleet will \u201crun entirely\u201d in autonomous mode, following a retrofit of driverless technology scheduled for completion in mid-2019.\nSome 29 Komatsu haul trucks will be retrofitted with Autonomous Haulage System (AHS) technology at the mine in the Pilbara region of Western Australia from next year.\nThe company will also be converting 19 Caterpillar haul trucks at its Marandoo mine to autonomous from mid next year, the first time Rio Tinto has deployed AHS technology on its Caterpillar brand vehicles.\nThe conversions represent a 50 per cent increase to the miner\u2019s autonomous truck fleet. Once the retrofitting is finished the company will have more than 130 autonomous trucks, representing about 30 per cent of the total fleet.\n\u201cWe are excited to be starting a new chapter in our automation journey with a valued long-term partner in Caterpillar and we are proud to be extending our successful partnership with Komatsu on this world-first retrofitting initiative,\u201d said Rio Tinto Iron Ore chief executive Chris Salisbury.\n\u201cRapid advances in technology are continuing to revolutionise the way large-scale mining is undertaken across the globe. The expansion of our autonomous fleet via retrofitting helps to improve safety, unlocks significant productivity gains, and continues to cement Rio Tinto as an industry leader in automation and innovation,\u201d he added.\nNo caption\nAHS allows trucks to be operated by a supervisory system and a central controller, rather than a driver sitting in the cab. It uses pre-defined GPS courses to navigate roads and intersections and the system knows actual locations, speeds and directions of all vehicles at all times.\nThe retrofitting project is part of the miner\u2019s $5 billion productivity programme. The company said it had already aggregated more than 3,500 employee ideas in the company\u2019s productivity pipeline, \u201cmany of which will deliver cost benefits\u201d.\nFurther expansion of the autonomous fleet is being considered.\n\u201cWe are studying future additions to our autonomous fleet in the Pilbara, based on value, to help deliver our share of $5 billion of additional free cash flow for the company by 2021. Rio Tinto is committed to working closely with our workforce as we transition to AHS including providing opportunities for new roles, redeployment, retraining and upskilling,\u201d Salisbury said.\nNo caption\nLast year, on average, each of Rio Tinto\u2019s autonomous haul trucks operated an additional 1,000 hours and at 15 per cent lower load and haul unit cost than conventional haul trucks. Rio Tinto said the increased automation has been shown to reduce the number of people exposed to potential hazards and reduce the number of \u201ccritical risk scenarios\u201d.\nAuto-mine\nRio Tinto started deploying autonomous technology in 2008. As well as the vehicles, its iron ore business operates six fully autonomous drill systems to drill production blast holes.\nThe miner ran its first fully autonomous heavy haul train in September 2017, completing a 100-kilometre pilot run without a driver on board. Dubbed \u2018AutoHaul\u2019 the rail project is on track for completion by the end of 2018, making it the world\u2019s first fully-autonomous heavy haul, long distance rail network.\nAustralia\u2019s mining companies are rapidly expanding the use of autonomous vehicles and equipment. \nIn November, miner Roy Hill CEO Barry Fitzgerald said the company would be making its giant pink trucks autonomous from next year. Six further drills will also be automated in 2018 (three are currently).\n \nFortescue Metals'in Juneannounced plans to up the number of driverless trucks at its Solomon and Chichester sites. In July,Mining Magazinereportedthat BHP would be doubling its autonomous fleet at Jimblebar, also in the Pilbara.