Regional Development Minister Danny Kennedy has said he will wait for the outcome of a public inquiry into the A5 road before making a decision on whether the project will go ahead.
The Roads Service has confirmed £35m has already been spent on project development.
Mr Kennedy said he would not be "stampeded" into a decision.
But Donegal North East Deputy Padraig McLaughlin said that the sole decision on whether the A5 project would go ahead wasn't down to Danny Kennedy.
And Deputy McLaughlin said this was another attack by the UUP on the people of the Northwest...