The Washington Metro is the heavy rail rapid transit system serving the Washington metropolitan area in USA.
It is administered by the Washington Metropolitan Area Transit Authority (WMATA), which also operates Metrobus
service under the Metro name.Besides the District of Columbia, Metro serves several jurisdictions in the states of Maryland and Virginia.
Opened in 1976, the network now includes six lines, 91 stations & 188 km of route.
Due to subway track depths, Metro's Wheaton station has the longest,
single-tier escalator in the Western Hemisphere, spanning 70 m Washington Metro. Wikipedia The Free Encyclopedia. September 14, 2022more on:--Wikipedia