In an annual survey about traffic congestion, Vancouver was again found to be the most congested city in Canada.

According to the survey conducted by TomTom, on average, journey times in Vancouver are 33 percent longer than when traffic in the city is flowing freely and 68 percent longer during evening rush hour and only slightly better than Los Angeles, which was ranked as the most congested U.S. city. Although ranked 10th overall among U.S. and Canadian cities, Montreal’s evening peak is the third worst between the two countries, with an average 71 percent longer commute than when traffic in the city is flowing free.

TomTom’s Congestion Index is based on real travel time data captured by vehicles driving the entire road network, according to company. TomTom’s traffic database contains more than six trillion data measurements and is growing by five billion measurements every day. The average congestion level for all the U.S. and Canadian cities analyzed between July and September 2012 is 18 percent.

Vancouver was followed by Toronto and Montreal as the most congested Canadian cities. Toronto was the sixth most congested city on the list of U.S. and Canadian cities with populations over 800,000.