Motorists who drive through city roadworks have been warned they could be fined £1,000.
Police say drivers have been spotted breaching road closure signs in Salhouse Road in Norwich and Atlantic Avenue in Sprowston - while motorcyclists have been seen mounting the pavement to get around the works.
Two motorcyclists have already been found and fined for the breach, with extra patrols to take place in the area to keep workers and pedestrians safe.
Officers have now put a traffic regulation order in place until Friday, September 2, and those who fail to comply with it could receive a £1,000 fine.
Work to set up new traffic lights in Salhouse Road and Atlantic Avenue will last until the day the traffic regulation order ends.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here