A9 dualling project

Dualling work in 2021 between Luncarty and Pass of Birnam, the second section of the scheme.
Location	Scotland (Perth to Inverness)
Proposer	Transport Scotland
Project website	https://www.transport.gov.scot/projects/a9-dualling-perth-to-inverness/
Status	In procurement [a]
Type	Upgrade to dual carriageway
Cost estimate	£3 billion[1]
Start date	2015
Completion date	2035 (initially 2025)

In 2011, Transport Scotland has envisioned a plan to upgrade the remaining 90 miles (145 km) of the A9, a trunk road in Scotland, between Perth and Inverness from a single carriageway to a dual carriageway. This means that the road should be widened from one to two lanes per direction (two to four lanes total), and will also have a central reservation. It also means an increase in speed for cars and motorcycles from 60 mph to 70 mph (96 km/h to 112 km/h).

A dual carriageway will allow drivers to overtake safely as they will not have to meet oncoming traffic and since a crash barrier will be provided on the central reservation, remove the risk of a head-on collision. As most of the A9 is currently a single carriageway, drivers may have to overtake heavy goods vehicles (HGVs) as they are limited to 50mph, which is 10 mph (16 km/h) lower than the speed limit for cars and motorcycles. The project started in 2015 with the hope to finish it in ten years time, but delays to the project meant that it would not be finished by the original deadline.

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