LI Marathon road closures take place through 3 p.m. today

Road closures for Sunday’s Long Island Marathon are underway and will be changing as the race progresses.

Nassau police reported the following closures well into the afternoon:

• Charles Lindbergh Boulevard (Merrick Avenue to Earle Ovington Boulevard): closed 5 a.m. to 10 a.m.

• Charles Lindbergh Boulevard (except above): closed 7 a.m. to 10 a.m.

• Merrick Avenue (north of Hempstead Turnpike): closed 7 a.m. to 10 a.m.

• Old Country Road (Post Avenue to School Street): closed 7:40 a.m. to 10 a.m.

• School Street (Old Country Road to Railroad Avenue): closed 7:40 a.m. to 10 a.m.

• Salisbury Park Drive: closed 7:50 a.m. to 2 p.m.

• Railroad Avenue: closed 7:50 a.m. to 10 a.m.

• Post Avenue (Railroad Avenue to Jericho Turnpike): closed 7:50 a.m. to 10:30 a.m.

• Eastbound Jericho Turnpike (Post Avenue to Brush Hollow Road): closed 7:50 a.m. to 11 a.m.

• Brush Hollow Road: closed 7:50 a.m. to 11:30 a.m.

• Carman Avenue (Old Country Road to Nottingham Road): closed 7:50 a.m. to 3 p.m.

• Wantagh Parkway (all exits and entrances): closed 7 a.m. to 3 p.m.

• Northern State Parkway (Post Avenue and Wantagh Parkway exits): closed 6:30 a.m. to 3 p.m.

• Meadowbrook Parkway (exits and entrances to and from Charles Lindbergh Boulevard and Eisenhower Park): closed 5 a.m. to 10 p.m.

• Eisenhower Park’s Park Boulevard: closed 7:15 a.m. to 10 a.m. (The Hempstead Turnpike entrance to the park will be open throughout the day for golf and Carltun guests.)

Additionally, security will be tight for the race, but there is “no credible threat” to the event or its participants, Nassau County Police Commissioner Patrick Ryder said Wednesday.

At a news conference in Mineola, Ryder said a “large contingent” of uniformed officers will be assigned to the marathon. They include members of the county’s Bureau of Special Operations’ SWAT Team, Homeland Security, K-9, Arson Bomb and Emergency Services, who will be equipped with portable radiation detectors.

“This is one of the top three issues we have each year that we need to address from a security standpoint,” Ryder said. “We do it very well. We use the proper amount of resources to make sure that the people in that race and our residents remain safe.”

Ryder said there is no specific threat to the event, which typically attracts 4,500 to 5,000 runners and another 3,500 to 5,500 spectators.

The security measures, which are largely the same as in recent years, include restricting the starting line on Charles Lindbergh Boulevard in Uniondale to registered participants, while all vehicles must be credentialed in advance, Ryder said.

Bags and backpacks belonging to runners must be clear and plastic and are subject to inspection from K-9 units before going on UPS trucks to the finish line, Ryder said.

Spectators are not allowed to carry bags of any kind to the finish line, which will be in Eisenhower Park in East Meadow, Ryder said. Packages or bags found on the ground will be destroyed and discarded, he said. Authorities said personal items should not be stashed by participants along the race route.

By Robert Brodsky

robert.brodsky@newsday.com@BrodskyRobert

Robert Brodsky is a breaking news reporter who has worked at Newsday since 2011. He is a Queens College and American University alum.