Tens of thousands of people are expected to head to Glasgow on Saturday for two major events.
The anti-terror rally will centre on Glasgow George Square
A massive rally to demonstrate against the recent extremist attacks across the UK will take place in George Square.
Police also expect about 12,000 people to attend the County Grand Orange Parade which is held on the same day.
From 0700 BST, thousands of people will join Orange Lodge parades across the city before making their way to the main procession at Blythswood Square.
The Orange parade is likely to disrupt the movement of traffic in areas to the north, south, east and west of the city.
From 0900 BST the main procession will move off from Blythswood Square into Douglas Street, St Vincent Street, Finnieston Street, over the Clyde Park Bridge along Govan Road, Lorne Street and Paisley Road West before finally arriving at Bellahouston Park for a rally.
The event is scheduled to finish at about 1900 BST.
Chief Superintendent David Christie of Glasgow City Centre and West Division said: "We are expecting 10,000 to 12,000 people to take part in the procession in Glasgow on Saturday.
"Local road closures and diversions will be in place throughout the day and I would strongly advise not to travel by car into the city centre.
"I would urge anyone intent on using their car in areas likely to be affected by the parade to be patient and allow plenty of time for their journey."
In a separate rally on the same day, Mosques and Islamic groups in Glasgow have organised the "Scotland United Against Terror" event.
The demonstration will be held on Saturday 7 July at 1330 BST in George Square, Glasgow.
Organisers said the day would be doubly significant as it will be the second anniversary of the London Tube bombings and one week after the Glasgow attack.
Faith leaders, churches and trade unionists were among those invited to attend, while Deputy First Minister Nicola Sturgeon has confirmed she will speak.
Osama Saeed, one of the organisers, said: "The incident in Riddrie [where a car rammed into an Asian shop and was set on fire] underscores the need to emphasise community cohesion at this point.
"We have a simple equation facing us. We have the terrorists on one side, and the rest of Scotland against them on the other whether they be Muslim, Christian, people of other faiths or none.
"We must not start accusing people of being terrorists when they plainly aren't."