The next stages of the A628 Dodworth Road improvement scheme will begin shortly, and the main contractor for the works has been recently appointed.
Most of the construction work for this scheme will be contained within the site boundary to create the new gyratory, and only when the internal works are complete will the work to tie into the current road network take place.
The works contract is expected to be completed by the end of the year.
Cllr Sir Steve Houghton CBE, Leader of Barnsley Council said: "The next phase of the development has been carefully planned, with a lot of work taking place in recent months to get us to this stage, and we can now award the main works contract for the project.
"It's vital, that under the economic impacts we are all facing, this key project is delivered. This is not just a highways scheme; it will deliver significant improvements for people accessing our new town centre. It will provide better connectivity for our businesses and our residents, and push forward our plans for growth and a thriving local economy.
"We will be working closely with the appointed contractor to make sure any disruption is kept to a minimum, and we will be keeping residents informed of progress throughout the scheme."