A series of weekend road closures on a busy stretch of dual carriageway in Sussex has begun.
The work to repair the Southerham railway bridge near Lewes will mean a section of the road will be closed for three consecutive weekends.
The eastbound side of the A27 near Lewes was closed late on Friday and is due to reopen on Monday at 0600 GMT.
It will close again from 2200 GMT on Friday 29 January to allow work to be carried out.
The westbound carriageway will also be closed for one weekend, starting at 2200 GMT on Friday 5 February.
The closures will take place between the Ashcombe and Southerham roundabouts.
Some night-time single-lane closures will also take place during the week until Wednesday 10 February.
Highways Agency structures manager Bala Vishnubala said: "Refurbishing the bridge now will avoid any unplanned closures causing disruption to road users.
"We have planned this work to limit delays by working around the clock on consecutive weekends.
"We would ask drivers to allow plenty of time for their journeys during the closures."