Details of a proposed toll on the planned Perth Freight Link were revealed on Wednesday when the state government released a summary of the project’s business case.

Federal Finance Minister Mathias Cormann joined WA Premier Colin Barnett and Transport Minister Dean Nalder in Perth, where WA’s largest infrastructure project was discussed.

The road, on which work is expected to begin in 2016 is designed to provide a direct freight line across Perth suburbs to the Fremantle Port.

Mr Nalder confirmed plans for a toll, saying it would operate with the use of GPS technology. He said only large trucks would have to pay the fee.

The state opposition has hit out at the plan to introduce a Freight User Charge to help with the funding of the Roe 8 freight link.

Labor’s Transport spokesperson Ken Travers told 6PR that there were other options available that would alleviate the congestion and remove large trucks form the roads.

Mr Travers said that there was a rail option available for immediate use that would cost only a tenth of the 1.5 billion dollar road project announced on Wednesday.