 Trains operate at a frequency of one to two minutes to five to ten minutes between 05 : 00 and 00 : 00 , depending upon the peak and off @-@ peak hours . Trains operating within the network typically travel at speed up to 50 km / h ( 31 mph ) , and stop for about 20 seconds at each station . Automated station announcements are recorded in Hindi and English . Many stations have services such as ATMs , food outlets , cafés , convenience stores and mobile recharge . Eating , drinking , smoking and chewing of gum are prohibited in the entire system . The Metro also has a sophisticated fire alarm system for advance warning in emergencies , and fire retardant material is used in trains as well as on the premises of stations . Navigation information is available on Google Transit . Since October 2010 , the first coach of every train is reserved for women . However , last coaches are also reserved when the train changes tracks at the terminal stations in the Red , Green and Violet Lines . To make travelling by metro a smoother experience , Delhi Metro has launched its own official app for smartphone users , ( iPhone and Android ) that will provide information on various facilities like nearest metro station , fare , parking availability , tourist spots near metro stations , security and emergency helpline numbers . 
