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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.

Status: 
In Preparation

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.

Map of the A9 dualling route

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.

Community engagement

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. 

Environmental challenges

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

We’ve put together a list of common queries in relation to the A9 dualling programme, covering topics including timelines, anticipated benefits, and environmental questions.

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). 

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