Chamber and committees

The Scottish Government remains committed to an infrastructure solution to address the A83 Rest and Be Thankful landslip risks.

Work continues on the design of the long term options along with data gathering. The Government recently awarded a £1.8 million ground investigation works contract to best inform the design process and are working towards announcing a preferred route for a long term solution in 2023.

At the same time work is also progressing on the medium term resilient route and with formal proposals scheduled for late 2022.

In terms of short term measures since August 2020, Engineers have installed various landslide mitigation measures including drainage improvements, debris fences, a catch pit and material barriers. The mitigation has been augmented by the construction of a 175m long, 6m high debris bund, which further protects the Old Military Road. As a result of the major landslides in August and September 2020, and to mitigate a similar event from recurring, a further catch pit is being formed to be completed in summer 2022.

The catch pits and fences are designed to ‘capture’ debris material from a landslip and prevent it from reaching the road. To reduce disruption while keeping all road users and roadworkers safe, temporary traffic light system has replaced the convoy operations on the A83 and now remain in operation. A convoy system is only used, where ground readings or heavy rain forecasts would determine such requirement.

The protection afforded by these measures has meant that the A83 and the Old Military Road local diversion have been able to remain in operation for all but eight occasions during 2021 and 2022 to date, meaning traffic did not have to use the longer diversion via Inveraray and Crianlarich.