An important route in Lewes will be closed for four months while Network Rail starts work on a £1.5m scheme to improve the railway bridge.
The Victorian bridge will be closed to cars from February 22 to July 3 and diversions will be put in place, causing disruption for motorists.
However the bridge will remain open to pedestrians throughout the works.
A spokesperson for Network Rail said: “Network Rail is investing £1.5m in making essential improvements to the railway bridge at Lewes.
“Our work will include vital repairs to the brickwork and metal spans of the bridge, and resurfacing the road.
“The bridge will also be repainted, in dark green, and all the weeds and vegetation removed.
“To do this, we need to temporarily close the bridge to vehicles and set up diversionary routes, which will last from 22 February to 3 July 2015.”
This follows a five week period at the end of last year when nearby Station Street in Lewes was closed while improvements were carried out.
This led to disruption for both motorists and traders as East Sussex County Council built a wider footpath and smoother road surface with the help of Government funding.
County and district councillor for Lewes Ruth O’Keeffe added: “I welcome the fact that the railway bridge is to be strengthened following co-operation between the railway company and the county council over the funding and arrangements for the work.
“The closure from February until July will inevitably mean traffic disruption for Lewes residents and visitors and noise for people living near to the bridge while it is being worked on, but the work is needed so that buses and other heavy vehicles which currently use the small residential roads nearby will be able to cross the bridge safely again.”
The works will be carried out under a temporary road closure from the bridge’s junctions with Southover Road to its junction with Priory Street.
A diversion route for through traffic will be signed and maintained for the duration of the works: northbound: B2193 Priory Street, Southover High Street and Southover Road and southbound: Southover Road and Garden Street. To facilitate the works Network Rail will temporarily revoke southbound traffic on Southover High Street making it northbound only. It will also temporarily revoke northbound traffic on Garden Street making it southbound only.
Network Rail said: “We do appreciate that these restrictions may cause some disruption to local road users and thank those affected for their understanding during the work.
“Everything is expected to be completed by the end of July.”
Access to properties will be maintained where possible but may be restricted at times and access for emergency vehicles will be maintained.
Parking will be temporarily suspended on Priory Street outside numbers 57 to 61 and on Southover Road from its junction with Station Road to its junction with Garden Street.