Plans for a bypass around Westbury in Wiltshire have been approved by the county council.
The £33.1m scheme, which will be funded by central government, will bring a single carriageway road round the eastern side of the town.
It is hoped it will cut traffic levels in Westbury by half.
The plans will be on show at The Laverton hall in Westbury from 28 to 30 June. A public inquiry is expected to be held later this year.
The campaign for the bypass has been running for 30 years, with the first planning application submitted in 2005.
The county council said that work on the bypass could start by 2009.