Ground work is under way on the long-awaited Balmedie-Tipperty dual carriageway project.
Site clearance has started on large swathes of land in the Foveran area.
The A90 section is being upgraded as part of the Aberdeen Western Peripheral Route (AWPR) scheme.
The development has been particualry welcomed by frustrated commuters making their way to and from Aberdeen on the heavily-congested route during rush-hour.
A Transport Scotland spokesman said: “The construction of the AWPR/Balmedie-Tipperty is now well underway and over the coming months the route will become increasingly visible to the North-east community.
“In the Foveran area, temporary fencing is currently being put in place and site clearance works are underway.
“Upcoming activity includes the construction of access roads, earthworks and utility works, which will be undertaken alongside the development of bridges and culverts for this area.”
The start of work has been welcomed by the local community and politicians.
Glen Douglas, Foveran Community Council secretary, said: “The community council are pleased to see work commencing at last on the dual carriageway between Balmedie and Tipperty, which when completed will make life better for the residents in the area, especially those of Foveran, where there have been many accidents in the past.
“It will also stop the frustration experienced by those travelling north at Balmedie during rush hour where at present the road goes from dual to single carriageway.”
Ellon and District Councillor Rob Merson also welcomed the start of work but was critical of the legal wrangle which held up the project for years.
He said: “However, we are now able to look forward to the delivery of one of the largest infrastructure projects in the area for many years.
“Allied to the forthcoming improvements to the A96, the Inverness rail line and the development of a new railway station at Kintore, Aberdeenshire will shortly be able to enjoy a transport network which is more in keeping with its status as the economic powerhouse of the nation.”
Councillor Gillian Owen repeated her call for the dualling to go all the way to Peterhead and Fraserburgh.
Councillor Owen, who has spearheaded the Why Stop at Ellon? campaign, said: “Seeing the developments along the roadside adjacent to my ward is brilliant. This essential piece of road will become part of the network sooner now rather than later.
“The Scottish Government should just keep going all the way to Peterhead and Fraserburgh.
“The Energetic Corridor is becoming more and more important to the area and the road infrastructure is just not fit for purpose.
“Stopping at Ellon is a false economy, the connectivity is needed just as much through to Peterhead and Fraserburgh. Both areas are reliant on their ports and the business that brings with it.”
The AWPR due for completion in late 2017, six months ahead of the original schedule.