Calls have been made for improved signage on the Ellon bypass as construction work on the new academy gathers pace.
A temporary 30mph limit has been imposed on the stretch of the A90 on either side of the Cromleybank Farm junction.
Bear Scotland say the measure is to slow down vehicles on the busy route to allow the safer movement in and out of the site by construction vehicles.
But the move has prompted concern that drivers are approaching the new zone from a 60mph limit without warning.
Ellon and District Councillor Gillian Owen would like to see improved signage put up at the nearby roundabout to alert road users.
She said she could understand heavy vehicles being allowed to turn off the A90 when they were going to the new academy site, but was she extremely concerned if they could join the road.
The councillor sought clarification from Bear Scotland.
She said: “The A90 is a crucial road locally so to see a new 30 mph speed limit on it was very strange.
“I have asked Bear Scotland if they will look at giving an advanced warning, preferably the other side of the roundabout.”
The reduction in speed limit has been approved by Transport Scotland, who manage the trunk road.
When the work on the school is complete, the speed limit will revert back to the national limit.
Work started on the Cromleybank site in June and the complex is scheduled to open in 2015.
It will include a 1,200-capacity school, five-lane swimming pool, Banff & Buchan Outreach Centre, Support for Learners unit and community, learning and development facilities.