Gridlocked Cities

Traffic congestion affects almost every driver with an urban commute in America, but precisely where and when is it at its worst? Using 7.7 million aggregated data reports, Geotab has visualized the detailed patterns across major U.S. cities throughout the day.

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A lane of slow-moving, congested traffic

Boston

Massachusetts

Worst Speed Drop

40% at 4-5pm

New York

Worst Speed Drop

38% at 5-6pm

Miami

Florida

Worst Speed Drop

37% at 5-6pm

Washington D.C.

-

Worst Speed Drop

35% at 5-6pm

San Francisco

California

Worst Speed Drop

34% at 5-6pm

Chicago

Illinois

Worst Speed Drop

33% at 4-5pm

Los Angeles

California

Worst Speed Drop

32% at 5-6pm

Seattle

Washington

Worst Speed Drop

31% at 4-5pm

Denver

Colorado

Worst Speed Drop

29% at 4-5pm

Philadelphia

Pennsylvania

Worst Speed Drop

27% at 5-6pm

Minneapolis

Minnesota

Worst Speed Drop

26% at 5-6pm

Tampa

Florida

Worst Speed Drop

25% at 5-6pm

Houston

Texas

Worst Speed Drop

24% at 5-6pm

Atlanta

Georgia

Worst Speed Drop

23% at 5-6pm

San Diego

California

Worst Speed Drop

23% at 5-6pm

Baltimore

Maryland

Worst Speed Drop

22% at 8-9am

Detroit

Michigan

Worst Speed Drop

21% at 5-6pm

Phoenix

Arizona

Worst Speed Drop

21% at 4-5pm

Dallas

Texas

Worst Speed Drop

20% at 5-6pm

St. Louis

Missouri

Worst Speed Drop

16% at 4-5pm

Traffic data consists of 7.7 million aggregated reports collected by Geotab GO devices from August 1, 2017 to July 31, 2018 each representing a 7-character Geohash (area approx. 150m square) for each hour of the day. The speed drop for a particular Geohash during a particular hour is calculated relative to the fastest-flowing hour for that Geohash. Dot size is based on the number of vehicles in that Geohash in that hour. The 20 cities shown are the most populous metropolitan areas in the US, according to the Census Bureau Population Estimates of 2016. City outlines were sourced from individual states’ open data sites, road outlines © OpenStreetMap contributors.

50%+

Speed Drop

City

State

Downtown

Brookwood
Interchange
(I-75/I-85)

Lennox Square
shopping mall

Westside
Reservoir
Park

Downtown

Baltimore
Harbor
Tunnel

Northern Parkway/
I-83 Interchange

Gwynn Falls/
Leakin Park

O'Neill Tunnel

Massachusetts
Turnpike

Morrissey Boulevard

Downtown

O'Hare
Airport

Downtown

I-90

Chicago-Kansas City
Expressway

I-30 Bridge
over Lake
Ray Hubbard

Downtown

US Route 75

Texas
Stadium

Denver
International Airport

Downtown

I-70

Valley
Highway

Downtown

Belle Isle

I-75/I-94 intersection

Fisher Freeway

Downtown

I-610

I-10

George Bush
Intercontinental Airport

Downtown

Los Angeles
International Airport

San Pedro

Hollywood
Sign

I-110

Downtown

I-195
(Julia Tuttle
Causeway)

South Dixie Highway
(US Route 1)

Dolphin
Expressway

Downtown

Lowry Hill
Tunnel (I-94)

University
Avenue

I-394

Times Square

I-95

JFK Airport

Queensboro
Bridge

Brooklyn Bridge

Center City

Philadelphia
International Airport

I-76/I-676
Interchange

Delaware
Expressway

Downtown

Phoenix
Sky Harbor
International
Airport

Black Canyon
Freeway (I-17)

Loop 101

Downtown

Escondido Freeway
(I-15)

Jacob Dekema
Freeway (I-805)

San Diego
International
Airport

Golden Gate Bridge

Oakland
Bay
Bridge

Financial District

US Route 101

Civic Center

Downtown

Space Needle

I-5

Industrial District

Downtown

I-64

Forest
Park

Mark Twain
Expressway
(I-70)

Hillsborough Avenue

Downtown

Howard
Frankland
Bridge
(I-275)

Tampa
International
Airport

14th Street
Bridges

The White House

DC Route
295

Downtown

New York
Avenue

Drag the slider or use the play button to move through the day and zoom in to see more detail

Roads

City

Landmarks

5-6pm

Speed Drop 31%

Average Speed

34mph