World Traffic Index 2019 - Bengaluru tops the list

Covering 416 cities across 57 countries on 6 continents, our Traffic Index ranks urban congestion worldwide and provides free access to city-by-city information. You, along with drivers, city planners, automakers and policy makers, can use the index to help tackle traffic-related challenges.

Reference – https://www.tomtom.com/en_gb/traffic-index/ra...g/

Bengaluru is leading as worst traffic congested city globally.
Three other Indian cities are there in the top 10 list.

According to the report, Bengaluru people driving during peak hours, spend an extra 243 hours in traffic each year.