A decision is expected on the route of HS2 through South Yorkshire today.
Two options are currently on the table. One that takes it by Meadowhall in Sheffield, and the 'preferred' option which goes through Aston, Bramley, Mexborough and the Dearne Valley.
A government report released overnight says the project will create thousands of jobs and double capacity.
Speaking about the increased capacity, Transport Secretary Chris Grayling said: “Anyone travelling to work by train each day will know we desperately need extra capacity.
"Demand for rail travel is rocketing and our ageing infrastructure is struggling to cope.
Building HS2 will create vital new capacity on our rail lines, giving inter-city customers a faster and more reliable service and freeing up space on local lines, making everybody’s journeys more comfortable and convenient. HS2 will bring businesses, employees and customers in our regions closer together resulting in increased competitiveness for the north and Midlands and rebalancing our economy.