This month, the bidding process will begin for two multi-million pound Scottish road improvement schemes.
Tender notices will be published by Transport Scotland for works on both the A75 Dunragit Bypass and the A77 Symington to Bogend Toll road.
On the A75, three miles of new road will be installed, which is designed to improve overtaking for both east and westbound traffic, while the removal of gaps in the central reservation and introducing grade-separated junctions on the A77 is focused on reducing accidents.
Transport minister Keith Brown said the department is committed to carrying out "major upgrades" to "key lifeline routes".
"Through these vital schemes for Ayrshire and Dumfries and Galloway we will enhance safety and journey time reliability while supporting communities, business and tourism."
It is hoped that the tender process will be completed by early next year and work is scheduled to finish in 2014.
Transport Scotland is also improving the M8, M73 and M74.