The Unesco World Heritage Site's setting was condemned as a 'national disgrace' in 1993 by the House of Commons' Public Accounts Committee, because of the close proximity of the visitor centre and busy roads.
Fifteen years later, plans have been drawn up to remove the roads and build a new visitor centre outside the site.
The project is a partnership between English Heritage, the National Trust, the Department for Culture, Media & Sport (DCMS), the Department for Transport and the Highways Agency.
English Heritage is hunting for an agency to handle media and stakeholder relations to support its plans to deliver environmental improvements at the site by 2012.
Public consultation on the plans was managed by Grayling PR and ended on 17 October. English Heritage is expecting the Government to make a decision on proposed road closures and options for the location of a new visitor centre by the end of the year.
English Heritage is hoping to draw up an agency shortlist in early December and make an appointment in February.
The successful agency will be asked to handle all communications and media matters for the project, including the planning application process, the construction and opening of facilities in 2012.