Key Highlights
- Kolkata registers the slowest traffic flow in India for 2024‑25, averaging 34 min 33 s for every 10 km.
- Commuters in Kolkata lose about 110 hours annually during peak periods.
- A top‑10 ranking includes Bengaluru, Pune, Hyderabad, Chennai, Mumbai, Ahmedabad, Ernakulam, Jaipur and New Delhi.
- TomTom’s traffic index reveals that the average travel‑time metric is the cornerstone for intercity comparisons.
- Global analysis shows that Latin‑American cities such as Barranquilla and Mexico City are the slowest worldwide.
Detailed Insights
What drives the slowdown? Overpopulation of vehicles, sub‑standard road maintenance and insufficiently planned transport corridors converge in most congested hubs. The annual time loss—ranging from 76 hours in New Delhi to 117 hours in Bengaluru—highlights the economic toll on workers and businesses.
TomTom’s Traffic Index operates by recording real‑time speed data, normalising it to a 10‑kilometre span, and then producing a comparative time‑loss percentage. States with higher vehicle‑to‑road ratios usually appear at the top of the list.
Comparatively, Barranquilla’s 10‑mile stretch consumes 35 minutes at an average of 10.3 mph, whereas Mexico City’s congestion rate sits at 52%, making it the world’s slowest city in terms of movement delay.
Key Concepts
- Congestion – A state where traffic exceeds the capacity of a roadway, resulting in prolonged travel times.
- Traffic Index – A metric that aggregates real‑time speed data to compute average travel times per fixed distance.
- Rush Hour – The daily peak periods (morning and evening) when vehicle volume is markedly higher.
- Average Travel Time – The mean duration required to traverse a standard distance, such as 10 km.
- Infrastructure Planning – Strategic design and execution of transport corridors to accommodate current and future vehicle loads.