Motorists will have to continue battling along the A259 as the opening of the £113 million Bexhill to Hastings Link Road has been delayed.
Record levels of rainfall last winter has forced East Sussex County Council (ESCC) to put the back the opening which was scheduled for May.
However the authority has been unable to set a new date.
Extensive archaeology work carried out on the site also added to the delay which was revealed at a Link Road information event in Sidley last week.
And ESCC told the
The Combe Haven Defenders group is calling for the council to be more transparent over the delay.
The group has been a vocal opponent to the BHLR with members taking to the treetops during protests when the work started early last year.
Anthony Bradnum, of the Combe Haven Defenders, said: “For almost two years, East Sussex County Council has been telling us that the link road would open in May 2015.
“Now it appears that will not be the case, but ESCC has not seen fit to share that information publicly. An extended construction time is likely to lead to increased costs, and we feel that the county council should be open and upfront about the implications of this entirely predictable delay.
“They are already wasting £113 million of public money on this disastrous project and if the cost is to increase even further, we have a right to be told.”
Karen Bowles, spokeswoman for ESCC, said: “A contingency had been built into the £113 million budget to cover additional unforeseen costs caused by factors including bad weather.”