In a year every Palermo commuter spends 147 hours blocked in traffic, according to the TomTom Traffic Index and La Repubblica, which measures traffic flow in 295 cities in 38 countries for all of 2015. Palermo, where buses get stuck behind carriage horses, had the worst traffic snarls in Italy. Second worst traffic city in Italy is Rome. Palermo is the fourth worst traffic city in Europe, coming after Lodz, Moscow and Budapest. Worst traffic in the world: Mexico City.