Although the overall project received an outline go-ahead from City of Edinburgh Council planners a year ago, detailed permission has now been given for the construction of the first sections of a boulevard which will eventually run from Eastfield Road – the main approach road to Edinburgh Airport – to a new entrance at the East side of the Centre.
RHASS chief executive Stephen Hutt said: "There have been some issues of detail to be discussed with the planners but these have now been resolved and we look forward to making a start on construction, probably following this year's Royal Highland Show in June.
"The boulevard will be a main artery serving the Royal Highland Centre and its completion is pivotal to the other developments envisaged for the East of the showground. It is heartening that we can now start to progress the plans to transform our grounds into a world class exhibition and event venue.
"At the moment our masterplan is the only major on-going development in the West of Edinburgh area. With our proximity to Edinburgh Airport, we are playing an influential role in establishing an international gateway to the capital and Scotland," added Mr Hutt.
The boulevard will be around 290 metres long and over 30 metres wide when footpaths and tree avenues are included, and will allow for the mass movement of vehicles and pedestrians to and from an impressive East Entrance, around which that side of the showground would be organised.
In 2003, the Aviation White Paper flagged up the proposed expansion of Edinburgh Airport, forcing the RHASS to consider re-locating off its Ingliston home entirely. But with the scaling back of the airport's plans, a 20 year masterplan was drawn up to improve and expand the present facilities, which was submitted for planning in 2010 and approved in April 2011.