Executive summary
This report sets out the option development and assessment process for a medium-term solution (MTS) to improve the resilience of the diversion route when the A83 Trunk Road is closed due to landslides, flooding, or other incidents, prior to a long-term solution (LTS) being introduced.
The option development and assessment process considered a range of options within Glen Croe, including options on or close to the line of the Old Military Road (OMR) and options off the line of the OMR, including along the southern slopes of the glen and on the line of or close to the forestry track.
The process concluded with the selection of three options:
- OMR Interventions;
- Single Lane Forestry Track Upgrade; and
- Developed Option L - Two Way Offline MTS along the line of the ‘Green Route’.
The report presents assessment summary tables and fact sheets for these three options.
The summary tables and fact sheets are presented in Appendices D and E respectively. The report concludes the development and assessment work carried out.
Based on the development and assessment work undertaken, the OMR Interventions is recommended as the preferred option for the MTS.