Thursday is the deadline for people to express their views over a proposed £193m road development around Stonehenge.
Before (top) and after, as envisaged in the plan
It is hoped that the re-routing of the A303 road, and a £57m visitor centre, will rescue the World Heritage site from its label as "a national disgrace".
The scheme proposes making the single-carriageway road dual at its busiest section and re-routing it out of sight of the stones by boring a tunnel.
More than 1,000 people have already made their views known and a public inquiry is to be held early next year.
But the National Trust, while supporting the overall scheme, has reiterated its call for the 2.1 km tunnel proposed by the government, to be lengthened.
Speaking in June, trust territory director Martyn Heighton said: "We are not convinced that the plan for a 2.1km tunnel will adequately safeguard the integrity of the site.
"There are strong archaeological and curatorial reasons for building as long a tunnel as possible, to preserve and enhance the qualities of the site."
Landowners the National Trust, monument keepers English Heritage and the
Highways Agency are working together on the scheme.
The publishing of the report sets off a 12-week public consultation period.
Work will start by 2005 if the scheme is approved.