Tokyo Metro 7000 Series at Railroad Crossing at the North of Jiyu-ga-oka Station
The train has a brown and yellow line under the windows. Yellow is Yurakucho Line color, and brown is Fuku-toshin Line color. When 7000 series appeared in 1974, Fuku-toshi Line did not existed yet. So the line was yellow. Fuji-toshin Line opened in 2009, and some security devices of the train were updated for through-service with Toyoko Line. The brown part means that the train can enter Toyoko Line track.
Tokyo Metro 7000 Series at Railroad Crossing at the North of Jiyu-ga-oka Station
The train has a brown and yellow line under the windows. Yellow is Yurakucho Line color, and brown is Fuku-toshin Line color. When 7000 series appeared in 1974, Fuku-toshi Line did not existed yet. So the line was yellow. Fuji-toshin Line opened in 2009, and some security devices of the train were updated for through-service with Toyoko Line. The brown part means that the train can enter Toyoko Line track.