Mr Carson will continue efforts to persuade transport secretary Michael Matheson the A75 needs turned into a dual-carriageway sooner rather than later.
Previously, Mr Carson invited the Minister to pay drive the route himself to see the problems that exist before meeting road users, campaigners and ferry operators Stena.
Unfortunately Mr Matheson failed to take up his offer claiming his diary was too busy.
Mr Carson said: “We can but hope that the transport secretary will now recognise the need for investment which has already been highlighted in the recent UK Government connectivity report carried out by Sir Peter Hendy.
“But in all honesty I am not exactly confident Mr Matheson will have changed his tune despite the huge economic benefits it will bring to Dumfries and Galloway.
“Nevertheless I will be pressing him continually to have this work carried out in a timely fashion and not simply ignored as he has done previously while in office.”
Mr Carson is also seeking a meeting with the newly-appointed rural affairs and islands cabinet secretary Mairi Gougeon.
It is hoped she’ll be more receptive to a new national park in Galloway than her predecessor.
This especially comes after First Minister Nicola Sturgeon recently committed to the target of protecting 30 per cent of land for nature by 2030 and was quoted as saying a Galloway National Park “perhaps has a big part to play in that”.
Mr Carson said: “This is an important issue in my constituency and something I have raised repeatedly at Holyrood in the past.
“I welcome Mairi’s appointment and I look forward to working with her in delivering what is the best practice for our needs.
“There remains a number of questions to be answered regarding establishing new national parks and more specifically a new national park in Galloway.
"I believe it would be beneficial to meet with the cabinet secretary and discuss the best way forward.”