 The motorway cost 65 million pounds to build, which when adjusted for inflation would come to approximately 150 million 2006 GBP.To help alleviate opposition to the intrusive motorway design, the wide carriageway was built to pass below the natural landscape, where possible.Man-made hills were constructed which, along with the planting of 250,000 new trees, helped to camouflage the motorway from view, and cut down on the noise level.