Network Rail has announced that AmeyColas is its preferred bidder for a new contract to operate and maintain its fleet of high-tech, high-output track renewal systems. The contract, worth around £250million, will see more than 1,600 miles of track - nearly 30% of Network Rail's total renewals workload - renewed and replaced over the next four years, with £85million in cost savings identified.rnNetwork Rail currently operates three high-output systems consisting of high-output ballast cleaners (which renew ballast to maintain a smooth ride), high-output track renewals trains and other support machinery and plant.rnThe company is expecting delivery of a fourth high-output system in December 2010.
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