Apprentice Boys and nationalist residents in Derry hope today's annual Relief of Derry parade will pass off peacefully in the wake of an "understanding" between the two sides.
With 10,000 Apprentice Boys and as many as 180 bands taking part in the parade, organisers expect almost 15,000 people to go into the city.
The parade retraces the entrance of the Apprentice Boys to the city at the end of the siege of Derry in 1689. It will enter the walled city from the east bank, then travel along the walls and past the cenotaph in the square known as the Diamond.
This area was a scene of trouble in previous years but the Governor of the Apprentice Boys, Mr Alistair Simpson, was hopeful that, with no nationalist protest expected, this would not be the case this year.
"There will always be scallywags intent on causing trouble, as in any city on a Saturday afternoon but both we and the Bogside Residents' Group are working hard to ensure the march remains trouble free," he said.
The police in Derry have said they are planning a low-key security operation for the parade. RUC sub-divisional commander Peter Sheridan said the force would do all it could to provide a normal atmosphere.
He said: "Like the general public, we are delighted and relieved that an accommodation has been arrived at. It makes our job a bit easier. But at the same time we have to be aware that there are 15,000 extra people coming into the city on Saturday who are going to be cheek by jowl with shoppers, but where possible we intend to use high-visibility, local officers to patrol the city centre."
Mr Sheridan said there would nevertheless be officers available in riot gear as a precaution against violence. Meanwhile, the Parades Commission has imposed restrictions on a number of Apprentice Boys' feeder parades for today's march. Among those affected are Bellaghy, Co Derry, and Dunloy, Co Antrim.