Scotland's Transport Minister Keith Brown is due to announce the contractors selected to take forward three major road schemes in the South West of Scotland.
Over £36 million is being invested in upgrading two stretches of the A75, at Hardgrove and at Dunragit, and on a scheme to improve the A77.
There have been repeated calls for improvements on the road between Hardgrove and Kinmount section, following a series of accidents, including one which claimed a baby's life.
A local newspaper campaign gathered more than 4,000 signatures on a petition seeking an upgrade.
Mr Brown described the A75 as a lifeline for south-west Scotland, highlighting its importance as a main route to the ferry terminal at Cairnryan.
More top news
Kerrie Gosney brings you Saturday night's forecast
East is best for sunshine. Cloudier, breezier with rain risk in the west. Warmer than average
Sanctuary takes place in the heart of the Dark Sky Park, and includes stargazing and a 'sky walk'.