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NYC congestion pricing cut fine particle pollution in Manhattan toll zone by 13% in first year

NYC congestion pricing cut fine particle pollution in Manhattan toll zone by 13% in first year

Rule Changes

Columbia-led study finds the decline tracked an 11% drop in vehicles entering the zone

October 7th, 2026: Columbia study published

Overview

Updated Oct 11

New York City's congestion pricing cut fine particle pollution inside the Manhattan toll zone by about 13% in its first year. A Columbia-led study published in Environmental Science & Technology Letters tracked air quality at 15 monitoring sites. The decline closely matched the roughly 11% drop in vehicles entering the zone.

The program, which took effect January 5, 2025, charges most vehicles entering Manhattan south of 60th Street. It cut traffic by 27 million vehicles and generated $550 million in net revenue for transit upgrades in its first year. In August, the city health department found air quality citywide held steady or improved slightly, with no new toll-related pollution in environmental justice communities along major highways.

Why it matters

If this holds, other US cities have a measured template for cutting traffic and air pollution at once.

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Key Indicators

13%
PM2.5 reduction inside congestion zone
Fine particulate pollution fell beyond what regional trends and weather would predict, per the Columbia study.
11%
Vehicle entry reduction
Average daily drop in vehicles entering the Congestion Relief Zone in the first year.
27 million
Fewer vehicles entering the zone
Cumulative reduction in vehicle entries during the first year of tolling.
$550 million
Net revenue in first year
Funds directed to MTA transit improvement projects.

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People Involved

Kathy Hochul
Kathy Hochul
Governor of New York
Championed congestion pricing; defending it against federal termination efforts
 Dr. Alister F. Martin
Dr. Alister F. Martin
New York City Health Commissioner
Released the city's first-year air quality evaluation of congestion pricing on August 14, 2026

Organizations Involved

Columbia University
Columbia University
Research university
Led the year-long air quality study

Columbia's Lamont-Doherty Earth Observatory and Mailman School of Public Health researchers tracked air quality at 15 monitoring sites across New York City.
Metropolitan Transportation Authority
Metropolitan Transportation Authority
Transit agency
Operates the Central Business District Tolling Program

The MTA runs the congestion pricing program, which charges most vehicles entering Manhattan south of 60th Street.
New York City Department of Health and Mental Hygiene
New York City Department of Health and Mental Hygiene
City Health Agency
Published its first-year air quality evaluation on August 14, 2026, finding stable or slightly improved pollution citywide

The city health department runs the NYC Community Air Survey and published its own assessment of congestion pricing's air quality effects.

Timeline

2025 October 2026

5 events Latest: October 7th, 2026 · 1 month ago
Tap a bar to jump to that date

  1. Columbia study published

    Latest Research

    Environmental Science & Technology Letters finds PM2.5 down 13% inside the toll zone, matching the 11% vehicle drop.

  2. NYC Health Department releases first-year air quality report

    Research

    The city found air quality stable or slightly improved across all five boroughs, continuing a 20-year trend. Environmental justice communities along major highway corridors saw no increase in pollution attributed to the tolls.

  3. One-year results announced

    Statement

    Governor Hochul reports 27 million fewer vehicles, an 11% traffic drop, and $550 million in net revenue.

  4. Congestion pricing takes effect

    Policy

    NYC becomes the first US city to toll drivers entering Manhattan south of 60th Street.

  5. Six-month npj Clean Air study finds larger rush-hour PM2.5 drop

    Research

    npj Clean Air estimated daily maximum PM2.5 inside the zone fell 22% over the first six months, tied closely to drops in heavy-duty truck traffic. The figure tracks rush-hour peaks, a sharper cut than the year-long 13% average.

Scenarios

1

Chicago becomes second US city to adopt congestion pricing

Possible Resolves by End of 2028

Discussed by: Urban policy analysts and transit advocacy groups

The measured air quality gains give cities like Chicago, Los Angeles, and Boston evidence to push similar programs. A city council vote or state legislature action would trigger this. The Columbia study's counterfactual methodology gives other cities a template for measuring results.

2

Federal court orders end to NYC congestion pricing

Unlikely Resolves by Jan 20, 2027

Discussed by: MTA and New York Governor's office

The MTA press release cites unlawful federal efforts to terminate the program. If a federal court or executive action succeeds, tolling would end. The legal battle has been ongoing since before the program launched.

3

MTA board votes to adjust congestion toll rates

Likely Resolves by Q2 2027

Discussed by: MTA board and transit policy analysts

The program could see toll changes, zone expansions, or discount adjustments based on first-year data. The MTA board would approve any changes. Revenue targets and traffic patterns will inform the adjustments.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

February 2003

London congestion charge (2003)

London introduced a daily congestion charge for central London in February 2003. Traffic fell about 15% in the first year, and the scheme is still running.

Then

Traffic and emissions dropped measurably within months.

Now

The scheme became the model for urban road pricing worldwide and has been expanded over two decades.

Why this matters now

London showed congestion pricing can deliver measurable traffic and air quality gains, the same claim NYC's first-year data now supports.

January 2006 - September 2007

Stockholm congestion tax (2006-2007)

Stockholm ran a seven-month congestion tax trial in 2006, then held a referendum that approved making it permanent. Traffic dropped about 20% during the trial.

Then

Voters approved the tax in a referendum after seeing traffic reductions.

Now

The tax remains in place and Stockholm's air quality improved measurably.

Why this matters now

Stockholm showed voters can support congestion pricing once they see results, a dynamic NYC's first-year data may replicate for other US cities.

Sources

(7)
+1
State of the Planet, Columbia University NYC Environment & Health Data Portal MTA npj Clean Air Good Green News Columbia University Mailman School of Public Health NYC Department of Health and Mental Hygiene