Derry City and Strabane police have urged motorists to take extra caution as a number of events will be taking place today and tomorrow.
Band parades are scheduled to take place in Newbuildings this evening; the first from 7.30pm until 8.15pm and a second, larger parade from 8.30pm until 11pm.
Diversions will be in place via Donemana.
Tomorrow, there is a planned march in the city centre with participants scheduled to move off from Bishop Street at 2pm, making their way through The Diamond towards Guildhall Square with dispersal from there at 3.45pm.
Police say all motorists should leave extra time for journeys and drive with care.
