Commuters have raised concerns that an “accident is waiting to happen” on a section of the new AWPR road.
Drivers claim the slip-road to Westhill at Kingsford is not big enough to deal with the volume of traffic using the exit during rush hour on weekdays.
The turn-off takes motorists off the A90 Stonehaven to Dyce road on to the A944 Aberdeen to Westhill road.
They say tailbacks start more than 300 yards from the slip-road during rush hour, and some drivers have suggested there needs to be an additional lane.
With traffic beginning to build up at 7.45am, the long lines continue for around an hour.
Regular road user Alasdair Green said: “It’s a very rapid build-up during rush hour, the slip-road isn’t capable of dealing with it.
“The build-up of traffic happens so quickly.
“At times you’re just praying that nobody smashes into the back of you.
“The roundabout is very busy and people drive fast on it because it so big.
“This means that getting onto the roundabout is difficult.
“Added to that is, with only a single carriage slip-road for a great length, the traffic very quickly queues back on to the main A90.
“Sitting stationary on the inside lane with cars coming up behind you at 70mph is terrifying – and it’s an accident waiting to happen.
“At times it is extremely dangerous.”
Iona Ross, who lives south of Aberdeen and commutes to work in Westhill, said: “It was a problem as soon as the road opened.
“It’s only a matter of time before there’s an accident.
“I’ve heard of more than one near miss.
“It’s a road I use on a daily basis, and it’s not exactly the most enjoyable part of my day.”
A spokesman for Transport Scotland said it was aware of traffic problems during busy periods.
He added: “We can confirm that our technical advisers are working with the contractor, Aberdeen Roads Limited and the local authority, Aberdeen City Council, to develop a solution which will reduce queue lengths.
“Safety is always our top priority but drivers should be reassured that visibility on the approach to this junction is good and provides road users with time to move to the outside lane safely and avoid any stationary vehicles.
“We always advise road users to drive to the conditions and approach any junction with awareness as a matter of routine.”