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TomTom launches Congestion Index based on traffic database; congestion levels in 57 cities in North America and Europe

Green Car Congress

Miami, 26%. Conversely, Edmonton, New York, Boston, Minneapolis and Toronto experienced a reduction in congestion levels. London, 27%. On average, journey times in Los Angeles take 33% longer than when traffic in the city is flowing freely and 77% longer during evening rush hour. Vancouver, 30%. Seattle, 25%. Tampa, 25%.