Nearly every town and many rural areas have scheduled local bus service. In larger towns and cities, lines crisscross the city. Where local rail service is offered, buses compliment those services. In the biggest cities, there may be several different bus systems in operation. In Berlin, you'll even find double-decker buses. Service intervals vary widely depending on the location and time. Many large cities also offer night bus service. In some places, especially smaller towns, bus service is operated by GermanRail (Bahnbus).