New York City’s Gridlock Alert Days begin Monday for the 2024 season, coinciding with the United Nations General Assembly’s high-level week. Security is heightened with President Biden and over 140 world leaders in town. A fuel spill on the Upper East Side caused additional traffic issues, leading to the evacuation of the nearby 19th Precinct. The city’s Department of Transportation has identified 20 days of expected heavy traffic, including the U.N. week and holiday season, urging residents to use mass transit.