The long-awaited upgrade of the Dunkettle Interchange in County Cork looks set to be delayed by 12 months.
It comes after Transport Infrastructure Ireland (TII) and the contractor failed to agree a price for the upgrade project.
Last year Sisk won the contract for the project, which was initially budgeted for €100 million.
However, it's now going back to tender.
According to TII, it's hoped the construction contract will now be awarded in 2020 - with sectional openings taking place during 2022 and full completion in 2023.
Sean O'Neill, director of communications with TII, told Newstalk Breakfast: "The Dunkettle Interchange has progressed... we've done the design elements, we've done the utility relocation testing.
"Now we basically sit down and discussed what we feel it would cost to build it... and this stage we cannot agree.
"Unfortunately, we just can't agree to the construction phase with [Sisk] - but we will go back out to the marketplace, and the contract should be awarded by this time next year."
TII has said the Dunkettle Interchange upgrade will mean the road is free flow for most movements - meaning it will not require vehicles to stop or give way as they negotiate the interchange.