Police have advised that a Royal Black Preceptory Parade will take place in Derry next Saturday, August 30th.
Traffic diversions and delays are likely from 11.30am on the day.
A PSNI spokesman said that traffic will not be allowed onto the parade route after 12pm and any cars parked on the parade route will not be able to move until the parade has passed their point.
Vehicles travelling from the Limavady direction towards Strabane will be diverted at Caw Roundabout via Crescent Link, Trench Road, and Duncastle Road to Newbuildings. Traffic bound for the cityside are asked to use the Foyle Bridge.
Vehicles travelling from Strabane towards Limavady will be diverted at Newbuildings via Woodside Road, Gortinure Road and Trench Road to Altnagelvin.
Cityside-bound traffic and local residents will be permitted to use Victoria Road and the lower deck of Craigavon Bridge, although delays should be anticipated.
There will be no access from the lower deck of the bridge onto Duke Street.
Chapel Road - which is normally restricted to one-way traffic - will be available for vehicles to travel in both directions throughout the day.
Police are also advising people travelling to the city to see the parade to use official car parks.
At the request of residents in the Waterside, parking restrictions will be strictly enforced. Illegally parked vehicles will be ticketed and may be towed away. Recovery will be at the owners’ expense.
Motorists should allow extra time for their journeys and should take extra care on the diversionary routes.
The event is schedule to conclude at about 4.30pm.