Millions of pounds have been spent developing four Cornish road schemes which have been put on hold.
The SWRA put forward 35 road schemes for the region
The Highways Agency and Cornwall County Council have spent about £7m on studies and consultants for schemes which have been put off until 2016.
It follows changes to regional transport priorities.
The South West Regional Assembly (SWRA) said it did not mean the Cornwall road schemes would not go ahead in the longer term.
Schemes were developed for a Camelford by-pass, projects at Chiverton Cross and Temple on the A30, and a route between St Austell and the A30.
But they have not been included in 35 schemes put forward by the SWRA to the Department for Transport for development over the next 10 years.
Cornwall County Council said it may now appeal for a return of some funds.
A council spokesman said: "We at Cornwall County Council will be pressing to get some of the monies back, because we spent that money in good faith."
Money was spent on impact assessments, feasibility studies and consultants.
The move is being back by the Truro and St Austell MP Matthew Taylor, who is meeting Junior Transport Minister Stephen Ladyman on Wednesday in an attempt to win a reprieve for a route between St Austell and the A30.
He said the change was a result of a shift from decisions being made regionally.
"The county was rightly spending money for a scheme that the Government said was going to be spent," he said.
"Given it's the Government who have changed the rules, it's the Government who should lose the money."
The Department for Transport said it now consulted regions to give them a bigger say in decision-making. It said overall road spending had gone up "four-fold".
Chris Mitchell, SWRA transport policy manager, said the four Cornwall schemes were not programmed to start "in the shorter term".
"That is not to say that they will never happen," he said.