Nigel Don, MSP for Angus North and Mearns, has called for an urgent meeting to consider how a grade separated junction at Laurencekirk is to be provided.
He has asked Nestrans, Transport Scotland, Aberdeenshire Council and Angus Council to meet after recent submissions by Transport Scotland to planning applications.
The submissions indicate that they would insist on a condition which would prevent developments being occupied or used before an improvement to the road system was in place, effectively preventing further housing or industrial development in the area.
A statement released by Mr Don said: “It is not clear how wide an area is actually affected but it includes Montrose as well as Laurencekirk.
‘‘It appears that housing already proposed within Aberdeenshire’s local plan cannot be delivered before there is a flyover.”
The argument made by Transport Scotland is that extra traffic will affect “the operational efficiency of the strategic network.
‘‘It is now clear that the argument has gone well beyond any discussion about safety at the Laurencekirk south junction.
‘‘We are now in a position where Laurencekirk is, in planning terms, closed for business; and this restriction must cover a wider area as yet undefined.
“Nestrans have commissioned a report on the best way to provide a grade separated junction. We need to see the results of that quickly, and we then need a clear commitment by the relevant authorities to get it built as soon as practicably possible.”