This option will reduce the impact of disruption for travel to, from and between Argyll and Bute and the central belt of Scotland, had the greatest potential to be delivered quickly, was the most favourable across a broad range of environmental criteria and had the greatest opportunity to encourage active travel.It should also be noted that the latest estimated cost for the preferred debris flow shelter option is £409 million to £510 million at 2024 prices; while the estimated cost of the Green Option as assessed during the route options assessment process was £821 million to £932 million at 2023 prices, significantly more than the debris flow shelter preferred option.Further detail on the assessment work undertaken during the route options assessment process is set out in the DMRB Stage 2 Route Options Assessment Report, a copy of which is available on the Transport Scotland website...