Chiyoda Line

Chiyoda Line
A Chiyoda Line 16000 series train
Overview
Other name	Line 9
Native name	千代田線
Status	In service
Owner	Tokyo Metro Co., Ltd.
Line number	C
Locale	Tokyo
Termini	Yoyogi-Uehara Ayase (Main line) / Kita-Ayase (Branch)
Stations	20
Color on map	Green
Service
Type	Heavy rail rapid transit
System	Tokyo subway (Tokyo Metro)
Operator(s)	Tokyo Metro Co., Ltd.
Depot(s)	Ayase, Yoyogi
Rolling stock	Tokyo Metro 16000 series Tokyo Metro 05 series (for Kita-Ayase Branch Line) Odakyu 4000 series Odakyu 60000 series MSE JR East E233-2000 series
Daily ridership	1,447,730 (2017)
History
Opened	20 December 1969 (1969-12-20)
Last extension	1979
Technical
Line length	24.0 km (14.9 mi)
Number of tracks	2
Track gauge	1,067 mm (3 ft 6 in)
Minimum radius	160.2 m (526 ft) (Main line) 143.8 m (472 ft) (Branch line)
Electrification	Overhead line, 1,500 V DC
Operating speed	80 km/h (50 mph) (Ayase - Yoyogi-Uehara 60 km/h (37 mph) (Kita-Ayase-Ayase)
Signalling	Cab signalling, Closed block
Train protection system	New CS-ATC, ATO
Maximum incline	3.5%
Route map Odakyū Odawara Line for Odawara Yoyogi-Uehara Odakyū Odawara Line Yoyogi-Hachiman Odawara Line for Shinjuku Yoyogi Depot Yoyogi-koen Harajuku Yamanote Line Meiji-Jingumae Fukutoshin Line Omotesandō Ginza and Hanzōmon lines Nogizaka Toei Ōedo Line Akasaka Ginza and Marunouchi lines Tameike-Sanno Ginza and Namboku lines Kokkai-gijidōmae Marunouchi Line Servicing connection to Yūrakuchō Line Kasumigaseki Marunouchi and Hibiya lines Marunouchi Line Mita Line Hibiya Yūrakuchō Yamanote and Keihin-Tohoku lines Nijūbashimae Tokyo Marunouchi, Yamanote and Keihin–Tōhoku lines Ōtemachi Tōzai, Mita, Otemachi Marunouchi and Hanzōmon lines Awajichō Shin-Ochanomizu Ochanomizu Chūō Line Yushima Toei Ōedo Line Nezu Sendagi Nishi-Nippori Yamanote and Keihin-Tohoku lines Nippori-Toneri Liner Machiya Keisei Main Line, Toden Arakawa Line Joban Line/Hibiya Line/Tobu Line for central Tokyo Kita-Senju JR Joban, Tobu Skytree Line, Tsukuba Express Arakawa River Central Circular Route Ayase River Shuto Expressway Line 6 Misato Route Ayase Ayase Branch Line splits from Joban Line Kita-Ayase Ayase Depot Joban Rapid and Local Line for Matsudo, Abiko, Toride

The Chiyoda Line (千代田線, Chiyoda-sen) is a subway line owned and operated by Tokyo Metro in Tokyo, Japan. On average, the line carries 1,447,730 passengers daily (2017), the second highest of the Tokyo Metro network, behind the Tōzai Line (1,642,378).

The line was named after the Chiyoda ward, under which it passes. On maps, diagrams and signboards, the line is shown using the color green, and its stations are given numbers using the letter "C".