THE long-awaited trial switch-off of traffic signals at junctions to St Margaret's Road begins on Monday.
The trial, which is being managed by Cheltenham Development Taskforce, Gloucestershire County Council and Cheltenham Borough Council, will last for three weeks and aims to assess junction efficiency.
It was due to be carried out last month, but was postponed while Severn Trent Water carried out emergency sewer works in Bath Road.
While the trial takes place, temporary islands and extra signs will be introduced to ensure road users are aware of the new layout.
Cheltenham Development Taskforce managing director Jeremy Williamson said: "While the postponement was disappointing, Gloucestershire Highways made the right decision in light of the disruption caused by the Bath Road works."
Severn Trent opened Bath Road to traffic last night, but said investigations into the cause of the problem would continue.