An emergency road closure is in effect in Harleston for public safety and bridge repair, Norfolk County Council has confirmed.
It has been placed on Station Hill, Dicky Hill and Gawdy Lane. It follows a collision that knocked the north end of the east brick parapet wall down in the river, a tributary to the River Waveney.
The council says the bridge and adjoining roads are not wide enough to allow vehicles to pass safety.
A spokesperson for Norfolk County Council said: “Scaffolding has to be designed and constructed before repair can begin. Works are expected to be completed by 20 May, earlier if possible.
“During the closure there will be signed diversions: west via Starston and east via Church Lane to the A143. Access to properties will be maintained at all times. The bridge will remain open to pedestrians and cyclists.
“The County Council apologises for any inconvenience this may cause.”
The work will be carried out by Norfolk County Council’s Community and Environmental Services Department and their contractors.
The council will seek to recover the cost of the works through an insurance claim.
Up-to-date information about roadworks in Norfolk is available online at www.norfolk.gov.uk/roadworks