Gridlock Alert Day: Meaning and 2026 Dates

Gridlock Alert Day: a date that NYC DOT names in advance as one of "the busiest traffic days of the year – the days when traffic is expected to be at its slowest and most congested." On those days DOT says it "will monitor traffic and make real-time adjustments to traffic signals," and it asks people to walk, bike or take transit instead of driving (NYC DOT Gridlock Alert Days). The word "gridlock" itself, DOT notes, was coined in New York City.

The 2026 dates

DOT's list for 2026, as published on October 12, 2026:

That is 20 days, 15 of them between November 18 and December 23. DOT does not say on that page why each date was chosen, and the list changes every year, so check it again for 2027.

Why it matters to TLC drivers

• Slower trips. Expect longer trips, later pickups and tighter timing for airport runs. This is about planning, not a rule.
• Same rules, more temptation. Double parking, stopping in bus lanes and blocking intersections are the habits that bring tickets on the worst days. DOT says double parking of passenger vehicles is illegal "at all times".
• Possible toll change. The MTA's Central Business District toll schedule says: "The Authority reserves the right to charge a 25% higher CBD charge on Gridlock Alert Days" (MTA CBD toll schedule, as recorded in our rates file on October 12, 2026). This is a reserved right, not a current surcharge. For taxis and app trips, the CBD charge is the per-trip charge paid by passengers ($0.75 taxi, green cab and FHV; $1.50 for trips dispatched by high-volume services). See Gridlock Alert Days and the congestion toll.

Where you will see this term

• On DOT's website and press releases each year, when the list comes out.
• In the MTA's CBD toll schedule (the clause above).
• In news traffic reports the day before.

Common mix-ups

• Not a closure. Streets stay open. Closures for parades, races and events are listed separately in DOT's weekly traffic advisory; see event days and street closures.
• Not an emergency. Travel bans come from emergency orders, not from this list.
• Not a TLC rule. We found no TLC rule tied to these dates.

Put the dates in your planner with our 2026 TLC driver calendar, which also has tax, medallion and renewal dates such as quarterly estimated taxes and the IRS mileage rate. Got a summons that day? The summons deadline calculator shows your dates. More on the places hub.