Iranian President Mahmoud Ahmadinejad, right, with Iranian Foreign Minster Manouchehr Mottaki during the summit on the Millennium Development Goals at the United Nations this morning (AP)

Ah, it's that time of the year when kids are back in school, days become darker earlier, and traffic is a complete mess on the East Side of Manhattan—yes, it's United Nations General Assembly time. With leaders from around the world in town to talk about global goals (or just arouse controversy), there's a heightened police presence and many street closures (see below). Also, if you're anywhere near Dag Hammarskjold Plaza—or a hotel where a world leader is staying...or most anywhere else—expect to see many protests.

President Obama will be in town on Wednesday and Thursday—he's the only world leader who gets a NYPD motorcade these days, after VP Biden ruined everything for everyone else.

MONDAY, SEPTEMBER 20th, 2010

The following streets will have one traffic lane dedicated to emergency vehicles for the duration of the General Assembly:

42nd Street from 1st Avenue to 5th Avenue

57th Street from 2nd Avenue to 5th Avenue

2nd Avenue from 41st Street to 57th Street

The following streets in the vicinity of the United Nations will continued to be closed to vehicular traffic:

1st Avenue from 42nd Street to 48th Street. The tunnel underpass from 41st Street to 48 Street will remain open passenger cars. Trucks and other large vehicles will not be able to access until the end of each day’s session.

44th Street from 1st Avenue to 2nd Avenue

45th Street from 1st Avenue to 2nd Avenue

46th Street from 1st Avenue to 2nd Avenue

The following will be closed to vehicular traffic beginning at approximately 5:00 a.m.:

42nd Street from the FDR Drive to 2nd Avenue

42nd Street Exit and Entrance Ramps of the FDR Drive

Please note: These areas will reopen each evening after the day’s session.

TUESDAY, SEPTEMBER 21st, 2010

The following streets in the vicinity of the United Nations will continued to be closed to vehicular traffic:

1st Avenue from 42nd Street to 48th Street. The tunnel underpass from 41st Street to 48 Street will remain open passenger cars. Trucks and other large vehicles will not be able to access until the end of each day’s session.

44th Street from 1st Avenue to 2nd Avenue

45th Street from 1st Avenue to 2nd Avenue

46th Street from 1st Avenue to 2nd Avenue

49th Street from 3rd Avenue to Lexington Avenue

The following streets will have one traffic lane dedicated to emergency vehicles for the duration of the General Assembly:

42nd Street from 1st Avenue to 5th Avenue

57th Street from 2nd Avenue to 5th Avenue

2nd Avenue from 41st Street to 57th Street

The following will be closed to vehicular traffic beginning at approximately 5:00 a.m.:

42nd Street from the FDR Drive to 2nd Avenue

42nd Street Exit and Entrance Ramps of the FDR Drive

Please note: These areas will reopen each evening after the day’s session.

Additional intermittent closures to vehicular traffic for Tuesday beginning at 7 a.m. include:

50th Street from Park Avenue to 1st Avenue

1st Avenue from 42nd Street to 50th Street

WEDNESDAY, SEPTEMBER 22nd, 2010

The following streets in the vicinity of the United Nations will continued to be closed to vehicular traffic:

1st Avenue from 42nd Street to 48th Street. The tunnel underpass from 41st Street to 48 Street will remain open passenger cars but will be subject to intermittent closures. Trucks and other large vehicles will not be able to access until the end of each day’s session.

44th Street from 1st Avenue to 2nd Avenue

45th Street from 1st Avenue to 2nd Avenue

46th Street from 1st Avenue to 2nd Avenue

49th Street from 3rd Avenue to Lexington Avenue

The following streets will have one traffic lane dedicated to emergency vehicles for the duration of the General Assembly:

42nd Street from 1st Avenue to 5th Avenue

57th Street from 2nd Avenue to 5th Avenue

2nd Avenue from 41st Street to 57th Street

The following will be closed to vehicular traffic beginning at approximately 5:00 a.m.:

42nd Street from the FDR Drive to 2nd Avenue

42nd Street Exit and Entrance Ramps of the FDR Drive

Please note: These areas will reopen each evening after the day’s session

On Wednesday the FDR DRIVE will subject to intermittent closures:

Southbound at 63rd Street

Northbound at South Ferry

Additional intermittent closures to vehicular traffic for Thursday beginning at 7 a.m. include:

50th Street from Park Avenue to 1st Avenue

1st Avenue from 42nd Street to 50th Street

THURSDAY, SEPTEMBER 23rd, 2010

The following streets in the vicinity of the United Nations will continued to be closed to vehicular traffic:

1st Avenue from 42nd Street to 48th Street. The tunnel underpass from 41st Street to 48 Street will remain open passenger cars. Trucks and other large vehicles will not be able to access.

44th Street from 1st Avenue to 2nd Avenue

45th Street from 1st Avenue to 2nd Avenue

46th Street from 1st Avenue to 2nd Avenue

49th Street from 3rd Avenue to Lexington Avenue

The following streets will have one traffic lane dedicated to emergency vehicles for the duration of the General Assembly:

42nd Street from 1st Avenue to 5th Avenue

57th Street from 2nd Avenue to 5th Avenue

2nd Avenue from 42nd Street to 57th Street

The following will be closed to vehicular traffic beginning at approximately 5:00 a.m.:

42nd Street from the FDR Drive to 2nd Avenue

The 42nd Street Exit and Entrance Ramps of the FDR Drive

These areas will reopen each evening after the day’s session

Additional intermittent closures to vehicular traffic for Friday beginning at 7 a.m. include:

50th Street from Park Avenue to 1st Avenue

1st Avenue from 42nd Street to 50th Street

The following will be closed to vehicular traffic beginning at approximately 5:30 p.m.

West 81st Street from Central Park West to Columbus Avenue

Please note: Trucks and other large vehicles will not be able to access:

Columbus Avenue from West 86th Street to West 77th Street

FRIDAY, SEPTEMBER 24th, 2010

The following streets in the vicinity of the United Nations will continued to be closed to vehicular traffic:

1st Avenue from 42nd Street to 48th Street. The tunnel underpass from 41st Street to 48 Street will remain open passenger cars. Trucks and other large vehicles will not be able to access.

44th Street from 1st Avenue to 2nd Avenue

45th Street from 1st Avenue to 2nd Avenue

46th Street from 1st Avenue to 2nd Avenue

49th Street from 3rd Avenue to Lexington Avenue

The following streets will have one traffic lane dedicated to emergency vehicles for the duration of the General Assembly:

42nd Street from 1st Avenue to 5th Avenue

57th Street from 2nd Avenue to 5th Avenue

2nd Avenue from 41st Street to 57th Street

The following will be closed to vehicular traffic beginning at approximately 5:00 a.m.:

42nd Street from the FDR Drive to 2nd Avenue

The 42nd Street Exit and Entrance Ramps of the FDR Drive

These areas will reopen each evening after the day’s session

Additional intermittent closures to vehicular traffic for Friday beginning at 7 a.m. include:

50th Street from Park Avenue to 1st Avenue

1st Avenue from 42nd Street to 50th Street

On Friday the FDR DRIVE will subject to intermittent closures:

Southbound at 63rd Street

Northbound at South Ferry