A public exhibition, highlighting the preferred choice, was held on Wednesday (2 April) to allow locals to view the plans and share their opinions.
It is understood that ground investigation works carried out at the site in recent months helped to inform the design of the preferred option.
Commenting, Transport Minister Keith Brown said: "The natural geography at Berriedale Braes, with a steep gradient and hairpin bend, is a very challenging road alignment, especially for HGVs and other long vehicles.
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"The fact that a preferred option is now on display is clear evidence of our commitment to find a solution and improve this important section of the road between Inverness and Thurso.
"Couple this with our £3 billion investment to dual over 80 miles of the route between Perth and Inverness – the first government ever to commit to do so – underlines just how hard we are working to upgrade the A9.
"We will continue to work with our partners to progress the Berriedale Braes scheme as a matter of urgency, and once we have considered all the comments to our proposals, push on and publish the final scheme outline later this year."
(JP/IT)
