Traffic congestion is a condition on transport that is characterized by slower speeds, longer trip times, and increased vehicular queueing. Traffic congestion on urban road networks has become increasingly problematic in major cities across the globe. Traffic congestion occurs when a volume of traffic or modal split generates demand for space greater than the available street capacity. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time it leads to a traffic jam.
Here is the list of the top 20 most congested cities in the world.
| Rank | City | Congestion level |
| 1. | Bengaluru, India | 71% |
| 2. | Manila, Philippines | 71% |
| 3. | Bogota, Colombia | 68% |
| 4. | Mumbai, India | 65% |
| 5. | Pune, India | 59% |
| 6. | Moscow region (oblast), Russia | 59% |
| 7. | Lima, Peru | 57% |
| 8. | New Delhi, India | 56% |
| 9. | Istanbul, Turkey | 55% |
| 10. | Jakarta, Indonesia | 53% |
| 11. | Bangkok, Thailand | 53% |
| 12. | Kyiv, Ukraine | 53% |
| 13. | Mexico City, Mexico | 52% |
| 14. | Bucharest, Romania | 52% |
| 15. | Recife, Brazil | 50% |
| 16. | Saint Petersburg, Russia | 49% |
| 17. | Dublin, Ireland | 48% |
| 18. | Odessa, Ukraine | 47% |
| 19. | Lodez, Poland | 47% |
| 20. | Rio de Janeiro, Brazil | 46% |
| Tel Aviv, Israel | 46% |
