A consultation on making Edinburgh's Spaces for People measures permanent will have to be restarted due to "errors" by the council - costing thousands of pounds and dragging the process out by another six months.
The blunder - which the council admitted was an "unfortunate setback" - has come as a result of mistakes in active travel plans advertised to the public including inaccurate information on bus lanes and yellow lines.
Transport convener Scott Arthur blamed contractors hired by the council for the job and said the episode demonstrated the need to "reduce our reliance on external consultants".