Metro
12) metro - a type of off-street transportation, all of whose tracks are technologically fully isolated from roads, whose lines are equipped with stations and are primarily located on underground sections, and the electric power supply to rolling stock is carried out through contact rails;
Source: Federal Law No. 67-FZ dated June 14, 2012 "On Compulsory Insurance of Carrier's Civil Liability for Damage to Life, Health, Property of Passengers and on the Procedure for Compensation of Such Damage Caused During Passenger Transportation by Metro"
Metro - a type of electrified urban off-street (underground, ground-level, elevated) passenger transportation
Source: ORDER of the Chairman of Moskomarkhitectura dated March 13, 2006 No. 52
"ON INTRODUCTION OF RULES FOR USE OF TERRITORIES OF TECHNICAL AND PROTECTION ZONES OF THE METRO IN MOSCOW"