People living in cities are the worst victims of traffic congestion. And their woes just get worse every year.

A traffic index created by TomTom, a navigation and GPS systems manufacturer, lists the cities which bear the brunt of traffic snarls.

For instance, a TomTom's study reveals that drivers in China spend an average of nine working days a year stuck in traffic.

The index measures travel time throughout the day and during peak periods and compares them with travel time during non-congested periods.

The difference is expressed as a total average percentage Congestion level.

The TomTom Traffic Index compares travel time during non-congested hours with travel times in peak hours experienced by passenger vehicles.

Take a look at 10 cities across the world with the worst traffic woes…

Moscow

Rank: 1

Country: Russia

Congestion level: 74%

Delay per hour driven in peak period: 76 min

Delay per year with a 30 minute travel: 128 hours

Congestion level on highways: 79%

Congestion on non-highways: 72%

Istanbul

Rank: 2

Country: Turkey

Congestion level: 62%

Delay per hour driven in peak period: 66 minutes

Delay per year with a 30 minute travel: 120 hours

Congestion level on highways: 73%

Congestion on non-highways: 54%       

Rio de Janeiro

Rank: 3

Country: Brazil

Congestion level: 55%

Delay per hour driven in peak period: 59 minutes

Delay per year with a 30 minute travel: 114 hours

Congestion level on highways: 45%

Congestion on non-highways: 58% 

Mexico City

Rank: 4

Congestion level: 54%

Delay per hour driven in peak period: 53 minutes

Delay per year with a 30 minute travel: 107 hours

Congestion level on highways: 43%

Congestion on non-highways: 60% 

Sao Paulo

Rank: 5

Country: Brazil

Congestion level: 46%

Delay per hour driven in peak period: 48 min

Delay per year with a 30 minute travel: 102 hours

Congestion level on highways: 30%

Congestion on non-highways: 52% 

Palermo

Rank: 6

Country: Italy

Congestion level: 39%

Delay per hour driven in peak period: 37 minutes

Delay per year with a 30 minute travel: 87 hours

Congestion level on highways: 29%

Congestion on non-highways: 45%

Warsaw

Rank: 7

Country: Poland

Congestion level: 39%

Delay per hour driven in peak period: 43 minutes

Delay per year with a 30 minute travel: 96 hours

Congestion level on highways: 37%

Congestion on non-highways: 41% 

Rome

Rank: 8

Country: Italy

Congestion level: 37%

Delay per hour driven in peak period: 40 minutes

Delay per year with a 30 minute travel: 92 hours

Congestion level on highways: 26%

Congestion on non-highways: 41%

Los Angeles

Rank: 9

Country: United States

Congestion level: 36%

Delay per hour driven in peak period: 39 minutes

Delay per year with a 30 minute travel: 90 hours

Congestion level on highways: 34%

Congestion on non-highways: 38%

Dublin

Rank: 10

Country: Ireland

Congestion level: 35%

Delay per hour driven in peak period: 43 minutes

Delay per year with a 30 minute travel: 96 hours

Congestion level on highways: 27%

Congestion on non-highways: 42%