Los Angeles police know where President Donald Trump’s motorcade will be driving through the city later today, but any drivers hoping to avoid the worst of the traffic won’t get many updates on road closures in advance.

LAPD spokesman Josh Rubenstein said police have been in “close communication” with federal authorities ahead of the president’s first visit to the city since entering the White House in 2017. But U.S. Secret Service officials asked that police not release any specifics of the route, he said.

All residents should know is that the president will be driving somewhere between the Westside and Beverly Hills this afternoon, Rubenstein said.

Police did alert drivers to road closures in downtown Los Angeles before noon Tuesday, but the notice came after the roads were already closed, according to the LAPD’s public information office.

Police closed stretches of Wilshire Boulevard, 7th Street and Figueroa next to the 110 Freeway in downtown sometime around 11 a.m., but an alert about the closures on Twitter wasn’t published until 11:39 a.m. The roads wouldn’t be opened again until 1 p.m.

About two hours later, LAPD tweeted that traffic downtown was “extremely congested.”

The #LAPD and @LADOTofficial want you to be aware that Downtown Los Angeles is extremely congested due to the Presidential visit. If possible, please avoid the area of 5th Street to Olympic Blvd, Union Ave to Grand Ave. pic.twitter.com/oWhLvxY6XY — LAPD HQ (@LAPDHQ) March 13, 2018

LAPD released a statement Tuesday morning saying officers will be “heavily deployed through the city to ensure the safe transport of the president and secure locations he will be visiting.”

“Every administration brings with it unique challenges and new protocols, and unfortunately out of an abundance of caution many details about this visit are being withheld for security reasons,” officials said in the statement.

President Trump will arrive at Los Angeles International Airport at 3:30 p.m., according to the White House. He will then likely be flown via military helicopter to the West Los Angeles area.

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Trump is scheduled to attend a Republican National Committee fundraiser in the Beverly Hills or Bel Air area Tuesday night. The location has not been disclosed. According to an invitation obtained by the Los Angeles Times, tickets for the event range from $35,000 just for the dinner up to $250,000 for the chance to meet Trump, attend a roundtable discussion and have a photo taken with him.

Heading to see the BORDER WALL prototypes in California! pic.twitter.com/fU6Ukc271l — Donald J. Trump (@realDonaldTrump) March 13, 2018

The Secret Service never releases the exact route of presidential motorcade. But for previous presidential visits, LAPD released lengthy lists of road closures the day of or a day in advance.

President Donald Trump landed in California moments ago. Follow our live coverage for updates on his trip through Southern California here: https://t.co/GHaNkAENRV #trumpvisit #DonaldTrump #TrumpinSD https://t.co/0XNFWk5C9O — O.C. Register (@ocregister) March 13, 2018

During his administration, President Barack Obama visited Los Angeles, mostly for fundraisers on the Westside, at least four times.

Here are the lists of road closures during those visits between 2011 and 2016:

Asked what was different this time around, Rubenstein didn’t have much information.

“This is the way the Secret Service is handling it this time,” he said. “Our priority is the safety of the president and the safety of our residents.”

LAPD is aware of the potential for protests, he said, especially in Santa Monica and downtown L.A.