The Department of Transportation (DOT) has identified nineteen Gridlock Alert Days during the UN General Assembly and throughout the holiday season when heavy traffic is expected in Manhattan.

On these Gridlock Alert Days, you should consider walking, biking, or taking mass transit for any trips in Manhattan.

The 2021 Gridlock Alert Days are:

• Monday, September 20
• Tuesday, September 21
• Wednesday, September 22
• Thursday, September 23
• Friday, September 24
• Monday, September 27
• Thursday, November 18
• Friday, November 19
• Tuesday, November 23
• Wednesday, November 24
• Wednesday, December 1
• Thursday, December 2
• Friday, December 3
• Wednesday, December 8
• Thursday, December 9
• Wednesday, December 15
• Thursday, December 16
• Friday, December 17
• Wednesday, December 22

DOT identifies these days by collecting and analyzing traffic data from past years. Gridlock Alert Days often come with the holiday season when more visitors travel to the City. 

Learn more about Gridlock Alert Days.