In recent days, Transport Infrastructure Ireland (TII) has declined an invitation to appear before the Joint Committee on Transport Tourism and Sport to address speculation on the project.
The move has exacerbated the concerns of Cork TD Kevin O’Keeffe, vice chair of that committee, who is demanding answers.
Between 80,000 and 100,000 vehicles use the congested interchange every day and the long-awaited upgrade will help address traffic coming from the east and northeast into Cork city and the South Ring Road.
The interchange upgrade was originally to cost €100m, but the price has already risen to €115m, with concerns that it could go even higher.
The TII is engaged in ongoing talks regarding costs with the contractors undertaking works on phase one of the project. The talks are part of a procurement process for the second stage of the project.