
Source: scientificamerican.com
The map below depicts the location of the top 100 bottlenecks for trucks in the United States on the Interstate Highway System in 2019. Note: Though shown in gray instead of red or pink, Kansas City has one bottleneck within the Top 100. To see the complete list, just click on this weblink.

Source: ops.fhwa.dot.gov/freight/freight_analysis/mobility_trends/national_list_2019.htm
Clusters of bottlenecks (more than two) occur in the following metropolitan areas:
- Los Angeles = 11
2. New York City = 8
3. Chicago = 7
4. Washington/Baltimore= 6
5. San Francisco/Oakland = 5
6-9. Atlanta, Dallas/Ft. Worth, Houston, and Philadelphia = 4 each
10. Nashville = 3
11-19. Boston, Chattanooga, Cincinnati, Denver, Minneapolis, Portland (OR), Salt Lake City, Seattle, and St. Louis = 2 each
Cities with surprisingly no bottlenecks within the Top 100 include Detroit, Milwaukee, Jacksonville, Cleveland, Louisville, Oklahoma City, Omaha, Orlando, Richmond, El Paso, Buffalo, Laredo, and any cities in the Carolinas.
SOURCE: https://ops.fhwa.dot.gov/freight/freight_analysis/mobility_trends/national_list_2019.htm