RTA operates approximately 1,442 buses on 107 routes, carrying almost 7 million riders on roughly 179,000 trips a month by the bus service; however the Dubai Metro is a driverless, fully automated metro rail system installed ubiquitously throughout the city. All trains and stations are air conditioned and equipped with and platform edge screen doors. The metro is divided into two lines, Red and Green; both lines together recorded a ridership of 164.3 million in 2014 as compared to 137.759 million in 2013 and 109.491 million in 2012.[15]