The second phase of a construction project to create a new transport route in Neath Port Talbot will go ahead after funding of £107 million was approved.
The multimillion-pound investment to complete the peripheral distributor road in the area will come from the Welsh Assembly government and the European Union.
The three mile link road, to be called Harbour Way, will join Port Talbot and the docks to the M4 at junction 38.
Neath Port Talbot Council’s environment director, John Flower, said work is expected to start on the project before Christmas.
The new building work will connect with previously completed sections of road and provide access to up to 210 hectares of mainly brownfield land for development.
The road will also crucially improve access to Port Talbot Docks and the Deep Water Harbour, encouraging the shift of freight from road to sea and creating a through flow which could enable the development of the waterfront area.
Deputy First Minister Ieuan Wyn Jones said: “Despite challenging economic times we are determined to invest in capital projects that will bring long-term structural and economic benefits.
“This investment will improve journey times, reduce congestion, encourage further investment, access to jobs and regeneration in the south west Wales region.”