But yesterday he disclosed that an "executive" decision was made on October 25 to go all green - although by gradual process. "It will be done slowly and over many years with no additional cost to ratepayers.
"When a blue sign reaches the end of its useful life - for instance due to vandalism, fading, rusting - it will be replaced by a green sign." He said 63 per cent of the city's signs were already green.
Mr Edmonds said both colours were safety approved by his organisation's traffic control committee.
Orakei Local Board chairwoman Desley Simpson said the decision was "typical Auckland Transport" and she was disappointed not to be consulted.
"There wouldn't be a day goes by that our officers don't field calls around issues with Auckland Transport and the difficulty local boards have is that AT is responsible through the governing body, not local boards," she said. "If it's cost-neutral, it's got to be based on a factual reason and I certainly haven't been made aware of it. Auckland Transport has to learn how to communicate better - they are spending ratepayers' money."
Auckland Transport chairman Lester Levy said the colour choice was a management decision.