Today, the Moscow Metro comprises twelve lines, mostly underground with a total of 203 stations. The Metro is one of the deepest subway systems in the world; for instance, the Park Pobedy station, completed in 2003, at  underground, has the longest escalators in Europe. The Moscow Metro is the busiest metro system in Europe, as well as one of the world's busiest metro systems, serving about ten million passengers daily (300,000,000 people every month). Facing serious transportation problems, Moscow has plans for expanding its Metro. In 2016, the authorities launched a new circle metro railway that contributed to solving transportation issues, namely daily congestion at Koltsevaya Line.