\r\nThe maintenance budget includes around 20,900km of track surfacing and\/or undercutting work and the replacement of more than 800km of rail and nearly 3 million sleepers.\r\n \r\n\u201cOur infrastructure is strong and robust,\u201d says Mr Carl Ice, BNSF\u2019s president and CEO. \u201cOur efforts to normalise our maintenance investment have positioned us to replace the right assets at the right locations at the right time. This allows our maintenance investment to be at similar levels year-to-year.\u201d\r\nAbout $US 500m of the capital plan is for expansion and efficiency projects. The majority of these projects are focused on key growth areas along BNSF\u2019s southern and northern trans-continental routes connecting Southern California with Chicago and the Pacific Northwest with the Upper Midwest.\r\nBNSF has also allocated $US 100m for Positive Train Control (PTC) as it moves towards meeting the December 31 2018 implementation deadline. \u201cBNSF is the only Class I freight railroad to have completed the installation of PTC on all its federally-mandated subdivisions and is currently running hundreds of trains daily with PTC as it tests revenue service across its mandated territory,\u201d BNSF says.\r\nBNSF also plans to invest $US 300m in the acquisition of freight wagons and other equipment.