Shortening the Train Headway

in Yokosuka Line

of JR East Company

Motoki HaradaEast Japan Railway company

RailTokyo2015

24 March 2015

1. Introduction

Outline of Yokosuka Line

Yokosuka Line

Tōkyō

Shinagawa

Ōsaki

Musashi-kosugi

Shin-tsurumi

Shin-kawasaki

Yokohama

Nambu Line

Yokohamahazawa

Shinjyuku

Kurihama

Ōfuna

Hebikubo

Nishi-ōi

Tōkaidō Line

Yokosuka

Odakyu Enoshima Line

Characteristic of Yokosuka Line

Table : Characteristic of Yokosuka Line

Yamanote Freight Line

Outline of Tōkaido Freight Line

Yokosuka Line

Tōkyō

Shinagawa

Ōsaki

Musashi-kosugi

Shin-tsurumi

Shin-kawasaki

Yokohama

Nambu Line

Yokohamahazawa

Shinjyuku

Kurihama

Ōfuna

Hebikubo

Nishi-ōi

Tōkaidō Line

Yokosuka

Odakyu Enoshima Line

Tōkaidō Freight Line

Characteristic of these lines

various trains are operated !

Yamanote Freight LineYokosuka Line

Tōkyō

Shinagawa

Ōsaki

Musashi-kosugi

Shin-tsurumi

Shin-kawasaki

Yokohama

Nambu Line

Yokohamahazawa

Shinjyuku

Kurihama

Ōfuna

Hebikubo

Nishi-ōi

Tōkaidō Line

Yokosuka

Odakyu Enoshima Line

Tōkaidō Freight Line

Mutual Direct Operation between Sotetsu Line and JR East Line

Tōkyō

Shinagawa

Ōsaki

Musashi-kosugi

Shin-tsurumi

Shin-kawasaki

Yokohama

Yokosuka Line

Tōkaidō Freight Line

Nambu Line

Yokohamahazawa

Shinjyuku

Kurihama

Ōfuna

Hebikubo

Nishi-ōi

Tōkaidō Line

Yokosuka

Yamanote Freight Line

Odakyu Enoshima Line

Ebina

Yamato

Shonandai

Futamatagawa

Nishiya

SotetsuIzumino Line

Sotetsu Main Line

Mutual Direct Operation between Sotetsu Line and JR East Line

Through trains could be set up 4 times an hour!

Minimum train headway：

2'30"→2'10" (Hebikubo ～Yokohama)

Tōkyō

Shinagawa

Ōsaki

Musashi-kosugi

Shin-tsurumi

Shin-kawasaki

Yokohama

Yokosuka Line

Tōkaidō Freight Line

Nambu Line

Yokohamahazawa

Shinjyuku

Kurihama

Ōfuna

Hebikubo

Nishi-ōi

Tōkaidō Line

Yokosuka

Yamanote Freight Line

Odakyu Enoshima Line

Ebina

Yamato

Shonandai

Futamatagawa

Nishiya

SotetsuIzumino Line

Sotetsu Main Line

In order to shorten the minimum train headway …

Many signal cables were neededSignal Systems

had to be repaired

T1(1)BEFORE

T2(<T1)

(2)AFTERMove

Increase

Expensive !

Simplification and Integration of Signal Equipment

・Changing the track circuit between stations to the non-insulated one

・The simplification and integration of signal control equipment

・The exchange of decrepit station interlocking devices

Severe environmental condition!

By carrying out both projects at the same time …

moving and increasing

wayside signals

simplification and

integration of

signal equipment

Reduction in cost

was possble !

Schedule

Table : Schedule of the related project

～2009 2010 2011 2012 2013 2014 2015 ～ 2018～

Feb.1st step

Mar.Musashi-kosugi

new station opened

Aug.2nd step

Jan.3rd step

Mutual direct operation project

Mutual direct

operation will

be started

3rd step: Yokohama station

1st step: Hebikubo signal station～ Shin-tsurumi signal station

2nd step: Shin-tsurumi signal station～ Yokohama station

2. Technological background

ATS-P system configuration

Wayside signal (Stop)

Transceiver Controller

Monitoring device or

Setting device of a train number

Display

Switch

etc.

On-board antenna

Tacho-generator

Velocity check pattern

Implemen

box

Trace of a train

Distance information to a stop signal

Ground coil

RepeaterEncoder

Repeater

Ground coil

On-vehicle equipmentOn-board antenna, Transceiver, Controller and so on

Ground equipmentEncder, Repeater, Ground coil and so on

Train identification information

Brakecommand

Aspect up function (the additional function of ATS-P)

Train identification information (HDC, MDC and LDC)

ECRP

EC EC

Aspect can be improved!Train identification

information

Basic sequence

MDC sequence

HDC sequence

Aspect sequenceG

Y

G

Y

YYR RR

Y

GG

Y

R

How to shorten the minimum train headway

R Y YG G

R Y G

YR G

R Y G

R Y G

R Y G

t2t1

T1

B

A

t0

U1

U2

U3

U4

U5

U6

Distance

Time

Succeeding trainPreceding train

A Sta.A Sta.

Speed(km/h)

Distance

75

Stop time

t2t1

T2

Un

YG G

Y G

R Y GA Sta.

B

A

Distance

Speed(km/h) 75

(1) Moving the related signalsIt is the easiest method of shortening the minimum train headway.

(2) Increasing the related signals (especially the mid-platform signal)

YG

Y

R Y

R

YR G

R Y G

R Y G

R Y G

t0

U1

U2

U3

U4

U5

U6

Distance

Time

Succeeding trainPreceding train

A Sta.

G

G

T2 < T1

B

A

t0

75 55

A Sta.

(3) YG assumption

R Y YG G

R Y G

YR G

R Y G

R Y G

R Y G

U1

U2

U3

U4

U5

U6

Distance

Time

A Sta.

Un

R Y GA Sta.

Distance

Speed(km/h)

t2t1

T3

R Y YG G

R Y G

YR G

R Y G

R Y G

R Y G

t2t1

B

A

t0

U1

U2

U3

U4

U5

U6

Distance

Time

A Sta.

Un

R Y GA Sta.

Distance

Speed(km/h) 75

T2

The mid-platform signal has already been increased !

T3 < T2

Time △T

Operating time come to be longer

How to shorten the minimum train headway

3. Case studies

Musashi-kosugi

Shin-tsurumi

Yokohama

Nishi-ōi

Hebikubo

Megurogawa

Shin-kawasaki

→Tōkaidō Freight Line

Tōkaidō Line

Revision and abolition of signals 【Legend】

: Newly Established

: Removed

Newly established signals

⇒ 62 signals

Removed signals

⇒ 35 signals

Replacement of aspects

⇒ 11 signals

Newly established air sections

⇒ 4 air sections

The amount of revision and abolition

Nishi-ōi Nishi-ōi

30″

HDC HDC

Figure : HDC after improvement

Nishi-ōi Nishi-ōi

HDC HDC

30″

Figure : HDC before improvement

Nishi-ōi station in up line

2′24″ 1′59″

Mehod : Moving and increasing the related signals

Increase

Increase

Move

Yokohama Yokohama

HDC MDC

40″

Figure : MDC after improvement

Yokohama

HDC MDC

Yokohama

40″

Figure : MDC before improvement

Yokohama station in down line

2′31″

2′20″

Mehod : Moving and increasing the related signals

40″

Increase

Increase

Move

Move

Yokohama Yokohama

HDC MDC(YG)

40″

Figure : MDC(YG assumption) after improvement

Mehod : YG assumption

Yokohama station in down line for MDC(YG assumption)

2′20″

Yokohama Yokohama

HDC MDC

40″

Figure : MDC after improvement

75(km/h/s)

55(km/h/s)

Speed

D1 2RS 16R 41R13R

2′05″ △13(sec)

4. Consideration and conclusion

In order to estimate the result of …

• The delay data was evaluated

every fiscal year from 2007 to 2013

• Data collection period

: From August to February (184 days)

• Delay time is recorded at …

TōkyōUp Line

Ōfuna

Down Line

Consideration

* 𝑇2, 𝑇5 , 𝑇6 , ~, 𝑇182, 𝑇184 < 1.0* N : Number of days in normal operating condition

𝑇1, 𝑇2 , 𝑇3 , ~, 𝑇183, 𝑇184 (min)

: Delay time per one passenger train per day

MDT =𝑇1+𝑇2+𝑇3+ ~+𝑇183+𝑇184

184(min)

MDT(in NC) =𝑇2+𝑇5+𝑇6+ ~+𝑇182+𝑇184

𝑁(min)

• Mean delay time (MDT)

• Mean delay time in normal operating condition

(MDT(in NC))

Consideration

1st step

(Feb. 2010)

2nd step(Aug. 2011)

MDT(min)

MDT(in NC)(min)

• MDT(in NC) had risen to some extent after 1st step.

The congestion at Musashi-kosugi station is

supposed to affect the train diagram.

• MDT(in NC) had nearly unchanged after 2nd step.

• MDT has not developed the characteristic tendency.

Conclusion

• The minimum train headway has been

shortened to be 2'10" and some regular

trains are actually operated at under 2'30"

intervals.

• The remarkable troubles have not ever

occurred and the safe and reliable

transportation service have been provided

in Yokosuka Line.

Thank you for your attention

Line/Page Original text Corrected text

7/P. 14 "… at the location of 2RS and 16R …"

"… at the location of D1 2RS and 16R …"

Errata of the manuscript !