The Prague Metro is the rapid transit network of Prague, Czech Republic. Inaugurated on May 9, 1974, the metro has since become an important component of Prague's transit system, providing a fast and reliable means of transportation for both residents and tourists. The system consists of three lines (A, B and C) serving 61 stations and is 65.2 kilometers long. Service runs from 4–5 a.m. until midnight, with a two to three minute interval between trains during peak hours and a four to ten minute interval between trains at other times. About 600 million passengers use the Prague Metro every year. Known for their punctuality and cleanliness, the metro stations display a mix of functionality and architectural diversity, reflecting the rich history and culture of the Czech Republic.