US President Barack Obama will arrive in the Canadian capital on Thursday for a day's visit.
Ottawa Police Forces and the US Secret Service have been on high alert since January to prepare for the heavy security measures.
Traffic delays and road closures are expected for Ottawa residents on Thursday from early morning till the afternoon when President Obama leaves. Passengers have also been warned of delays at the time of President Obama's arrival and departure.
Ottawa Police Superintendent Charles Bordeleau said on Tuesday at a press conference that the police would have two important roles to play, one to ensure the safety and security of all parties involved -- the president, his entourage, the public and the police, the other to minimize inconveniences for the residences, businesses and visitors to the capital region.
Officials are working to "help everyone understand and react to any threat, preparation requires proactive activity to anticipate crisis," Bordeleau said.
President Obama will arrive at Ottawa airport around 10:30 a.m. local time (1530 GMT) and will take one of the routes planned in advance to head to Parliament Hill for a day of meetings.
Roads around the Parliament Hill will start to be closed around 7:30 a.m. (1230 GMT).
Security measures will include lots of officers on the ground teams covering the entire route from the airport to Parliament Hill, the closure of all bridges along President Obama's route to Parliament Hill, significant crowd control and undercover crowd infiltration.
President Obama's Secret Service protection has been in Ottawa for the last month preparing for the visit. They will serve as his close protection during the visit and will be armed.
Massive crowds are anticipated for President Obama's visit, but a warm reception is expected this time, unlike in 2004 when George W. President Bush arrived, 5,000 protesters showed up.
"He's a very popular President, and if there's any indication from the crowds who have been following him around in the United States, there's going to be a large crowd showing up, trying to catch a glimpse of the President or the motorcade," said Bordeleau.
He said police have not been made aware of any major protests in conjunction with President Obama's visit. "The expectation is the crowd will be very receptive," said Bordeleau. "But if there are demonstrations, we're there to facilitate their right to demonstrate."
But he cautioned it would be hard even to get a glimpse of the US President, as he will probably not show up in the public during the few hours' short stop.