New York City officials have issued a gridlock alert as world leaders convene at the United Nations for the meeting of the General Assembly.

The NYPD says the roads impacted will stretch from 42nd Street to 57th -- and from First Avenue to Fifth Avenue.

They suggest you avoid the area from 6 a.m. - 7 p.m. through Friday.

Thousands of officers will be spread out throughout the city to keep everything safe and running smoothly.

For the first time in three years, leaders will be delivering their speeches in person in the vast General Assembly hall. There will be no more COVID-caused prerecorded addresses or hybrid meetings, with one exception: Ukrainian President Volodymyr Zelenskyy.

The U.S. president, representing the host country for the United Nations, is traditionally the second speaker. But President Joe Biden is attending Queen Elizabeth II’s funeral, and his speech has been delayed until Wednesday morning. Senegalese President Macky Sall is expected to take Biden's slot.

During typical high-level weeks, thousands of people are in the U.N. complex for speeches and hundreds of side events. But because of the continuing pandemic, this year only the few events organized by the secretary-general and the General Assembly president are being held at U.N. headquarters. Dozens of side events will take place elsewhere in the city.