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Keiyo Line

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Introducing

The Keiyo Line, which opened in 1990, is a relatively young line within JR East, connecting Chiyoda-ku, Tokyo, with Chiba City, Chiba Prefecture.

Except for the underground section between Tokyo Station and Etchujima Station, the entire line is characterized by running on elevated tracks along Tokyo Bay. The area along the line is being redeveloped as reclaimed land on Tokyo Bay, and in addition to new towns, theme parks, large shopping malls, and offices are towering above the area.A delta line (connecting line) is provided from Nishi Funabashi Station on the Musashino Line to Ichikawa Shiohama Station and Minami Funabashi Station on the Keiyo Line, and Musashino Line trains operate directly to the Keiyo Line.

Key data

  • Line length:  43 km
  • Number of stations: 17
  • Safety system: ATS-P
  • Train model: E233-5000 series
  • Max speed:
    • Soga ~ Tokyo : 100 km/h
  • Max speed after signals :
    • Reduced speed (green/yellow) : 75 km/h
    • Caution (yellow) : 55 km/h
    • Speed restriction (yellow/yellow) : 25 km/h
  • Routes:
    • Soga ~ Tokyo (1510Y) : "Local" - 10 cars - 17 stations - 43 km
    • Soga ~ Tokyo (780Y) : "Local" - 10 cars - 17 stations - 43 km

Console detail

Apart from the pocket watch and the door-closing indicator in the center of the console, there are 2 displays.

Main screen

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The first screen (train technical info) displays electrical voltages and various indicators at the top.

The bottom area contains:

  • Brake level and indicators for emergency brake in red (非常) and speed limit in green (抑速)
  • Brake cylinder pressure (BC)
  • Main air reservoir pressure (MR). Note that if this falls below the red zone (780kPa), the compressor starts up.
  • Speed dial.

Here are the translations of the indicators:

  • Top :
    1. P power supply (P電源)
    2. Pattern approach (パターン接近)
    3. Brake operation (ブレーキ動作)
    4. Emergency brake (非常ブレーキ)
    5. Brake release (ブレーキ開放)
    6. ATS-P
    7. Failure (故障)
    8. ATS power supply (ATS電源)
    9. ATS operation (ATS動作)
  • Bottom :

    1. 3-phases (三相)

    2. Emergency short-circuit (非常短絡)

    3. Snow resistant brakes (耐雪ブレーキ)

    4. Safety Brakes (直通予備)

    5. Cruise control (定速)

    6. Parkin

TIMS screen

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The second screen containsConsult the tripMON/TIMS/INTEROS information.screen Thepage upperfor partmore showsdetails about the time,TIMS speed and distance between the train and Tokyo station. Below this, the train number is shown.screen.

Movie

Then, in the center, you see a representation of the stations to come. The line runs from right to left:

  • The last station with a set departure time (Shin-Narashino/新習志野 - 16:14:10)
  • The current station (or one we've just left - Minami-Funabashi/南船橋) and the next 4 stations, potentially with an arrival time (in minutes - above the line) and a departure time (in minutes - below) (Futamata-Shinmachi/二俣新町 - Ichikawa-Shiohama/市川塩浜 - Shin-Urayasu/新浦安 16: 26:40 - Maihama/舞浜)
  • The next station with a specified arrival/departure time (Kasairinkai-Kōen/葛西公園 - 16:33:00)
  • The station and arrival time at the terminus (Tokyo/東京 - 16:46:20)

Finally, at the bottom of the screen are the different cars. The indicator above each car shows whether the doors are open (lit) or not. The cars can take 2 colors: blue (engines in use) or yellow (brakes in use).

Wikipedia: https://en.wikipedia.org/wiki/Keiy%C5%8D_Line 

Driver's guide: https://docs.google.com/spreadsheets/d/1uvxb3tELhCmwDvdRfkYscjmj_4mbb01k4Q4aaB-6SaA/edit#gid=1823883666

Movie of the line: https://www.youtube.com/watch?v=SHp7ldRC3lc

Timetable (in japanese - read from right to left) : https://docs.google.com/spreadsheets/d/1uvxb3tELhCmwDvdRfkYscjmj_4mbb01k4Q4aaB-6SaA/edit#gid=2115772756

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