A9 dualling Perth to Inverness
This £3 billion project involves the upgrade of 80 miles of single carriageway along the A9 between Perth and Inverness by 2025.
The project is designed to deliver economic growth through improvements to road safety and journey times as well as better links to pedestrian, cycling and public transport facilities.
Dualling the A9 will also provide greater access to the many tourism and recreation sites along the route of Scotland's longest trunk road.
The route requires dualling between 12 sections, with development already underway for three of the schemes:
About the project
Upgrading the A9 to dual carriageway will be complex, requiring careful planning and design to ensure we have the right scheme before construction work can start. Find out more about this project, including key facts and the challenges ahead.
Engagement with directly affected communities and businesses is at the heart of Transport Scotland’s major infrastructure projects and is a vital part of our work as we develop plans to dual the A9 between Perth and Inverness. We're committed to further developing our stakeholder and community activities and we continue to host exhibitions and community events about the project. Find out more about upcoming events along the route and review exhibition materials.
The A9 dualling strategy
Our project strategy identifies packages of design and development work to be programmed over the coming years with the objective of completing the dualling by 2025. This section includes details of the different design and development stages of the project, as well as information on the agencies we've consulted.
The A9 passes through areas which are outstanding in wildlife and landscape terms, some of which are of national or international importance.
Frequently asked questions
Contact the A9 dualling team
A9 dualling document library
View documents and reports relating to the project including the DMRB Stage 1 Report and Geotechnical Preliminary Sources Study Reports (PSSRs).
A9 safety plan
Dualled section of A9 at Crubenmore, completed in 2011
The A9 trunk road is the main route that connects central Scotland and the Highlands.
It stretches from Dunblane, situated north of Stirling, and travels north bypassing Perth and Inverness before finishing in Thurso.
The route is made up of single and dual carriageways with varying speed limits.
It carries a broad mix of road users comprising local drivers, commuters, freight transport and tourist traffic.