The construction of the new road linking the Cardiff River to the Cardiff city centre is set to begin this week.
Work on the project has been carried out by a consortium of organisations including the Welsh Government, Cardiff City Council, Welsh Water, the Welsh Construction Industry Association, the Wales Government, the Department of Transport, the Transport Research Laboratory and the Wales Regional Transport Authority.
In the event of a breakdown in traffic, the construction team will move to another site to complete the work.
The route will be a three-lane road, which will link the River Meuse to the City Centre, and will provide a link between the north-east of the city and the south-west of Wales.
The new route will provide an additional 1.4km of road to the south of the City.
The Welsh Government said the new route would enable Wales to continue to meet its long-term transport targets and create a more resilient city.
“This is an important step forward in our plan to transform Cardiff and we are looking forward to seeing the first phase of this road on the ground,” said Cardiff City Mayor Daniel O’Connell.
“It will bring a major improvement in traffic flow and we hope to see more people using this road, with its new access points, as well as the potential for a number of new businesses to open in the new development.”
The project is due to cost around £2.2 billion.