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Railroad system, which provide trains with advance notice of operation conditions ahead, are installed to ensure maximum operating efficiency and to protect against accidents by ensuring safe intervals beween trains.
Included are signals, switches, track circuits, interlocking system, block system and level-crossing signals, etc. Currently, advanced automatic systems such as centralized traffic control systems (CTC), automatic train control systems (ATC), and electric and electronic token block systems are contributing to increase transportation capacity, greater safety, higher management efficiency, and better-quality service.
 
Major Facility Status
Classification Signal Type Total Planned Installation Current Installation %
Distance (Km) no. of stations
ATC 3,119.9km 52.1 21 1.6%
CTC 1,117.4 164 35.8%
ABS 1,763.5 273 56.5%

ATS 3,119.9 480 100%
Interlocking Units Electronic 481Stations 56Stations 11.6%
Electric 403Stations 83.7%
Mechanical 32Stations 6.6%
Safety System for level crossing Electric Gate Crossing 1,836points 1,680points 91.5%
Alarm Signals 1,725points 94.0%
Defect Inspection 1,422points 77.4%
Obstacle Detection 278points 15.1%
Data Analyzing Equipment 828points 45.0%


Automatic Train Control(ATC)
  System allowing train to run automatically without signals on track by
transmitting driving conditions from track to driving cab. 
Line Section Extention (Km) Stations Note
Total
52.1 21 Installation Rate:1.7%
Gwacheon Geumjeong-Namteryeong 14.4 5
Bundang Suseo-Ori 18.5 9
Ilsan Jichuk-Daehwa 19.2 7  




Centralized Traffic Control(CTC)
  CTC controls the signal and other electric systems in stations by a remote
control system. Increases safe operation of train and track capacity.


Installation Status
Line Section Facility Seoul Daejeon
Extention
(km) 		Sta-
tions 		Extention
(km) 		Sta-
tions 		Extention
(km) 		Sta-tions

M
E
T
R
O
P
L
I
T
A
N 		Gyeongbu Seoul
-Suwon		 41.5 11 41.5 11    
Gyeongin Guro
-Incheon		 27.0 5 27.0 5    
Gyeongeui Yongsan
-Uijeongbu		 32.4 7 32.4 7    
Gyeongwon Seou
l-Susek		 8.2 3 8.2 3    
Ansan Geumjeong
-Ansan		 19.5 3 19.5 3    
Gwacheon Geumjeong
-Namteryeong		 14.4 5 14.4 5    
Bundang Suseo-Ori 18.5 9 18.5 9    
Ilsan Jichuk
-Daehwa		 19.2 7 19.2 7    
Subtotal
180.7 50        
Gyeongbu Suwon
-Busan		 402.8 58 36.8 6 238.8 34
Jungang Mangu
-Yeongju		 218.8 45 146.5 31    
Taebaek Mangu
-Yeongju		 103.5 20        
Yeongdong Yeongju
-Gangneung		 193.6 32 1      
Mukhohang, Samcheok 18 2        
Total 1,117.4 207 364 87 238.8 34
 
Line Section Busan Yeongju
Extention
(km)		 Stations Extention
(km)		 Stations
M
E
T
R
O
P
L
I
T
A
N 		Gyeongbu Seoul - Suwon        
Gyeongin Guro - Incheon        
Gyeongeui Yongsan - Uijeongbu        
Gyeongwon Seoul - Susek        
Ansan Geumjeong - Ansan        
Gwacheon Geumjeong
- Namteryeong		        
Bundang Suseo - Ori        
Ilsan Jichuk - Daehwa        
Subtotal
       
Gyeongbu Suwon - Busan 127.2 18    
Jungang Mangu - Yeongju     72.3 14
Taebaek Mangu - Yeongju     103.5 20
Yeongdong Yeongju - Gangneung     193.6 32
Mukhohang, Samcheok     18 2
Total 127.2 18 387.4 68
Operating distance 3,119.9km compared to installation rate of 35.8%




Major CTC Suppliers
Classification Seoul CTC Synthesized Control Center 362.8km,
87stations		 Daejeon CTC Synthesized Control Center 238.8km,
34stations		 Busan CTC Synthesized Control Center 127.4km, 17stations Yeongju CTC Synthesized Control Center 128.2km, 26stations
Installation Year 1997 1985 1992 1998
Type VAX ft410
VAX ft310
Alpha Server4100		 Alpha2100 VAX II TANDEM1407E
Transmission city division
   multiple drop
 city division
   multiple drop
 city division
   multiple drop		 city division
   multiple drop
frequency
   (FSK)		 frequency
   (FSK)		 frequency
   (FSK)		 frequency
   (FSK)
 1,200BPS
 1,200BPS
56KBoud(DTC)		 1,200BPS
56KBoud(DTC)		 1,200BPS
 communi
  -cation cable		  communi
  -cation cable
optic cable		  communi
  -cation cable		  communi
  -cation cable
Manufacturer Sanjeon
US&S		 Geumseong
   Sanjeon
GRS		 Geumseong
   Sanjeon
GRS		 Hyeoksinjeon
   Construction
   Corp


Automatic Block Signal(ABS)
  Automatic train control signal system devised to shorten blocks by installing
several signal posts between one station and the other, and automatically giving
directions to train.


Installation Status
Subject(km) Facility Status Installation Rate Note
Installation Place Extension(km) No. of Stations
3,119.9 Gyeongbu line
and 21 lines		 1,763.5 273 56.5% Block Signal:
1,806 units
 
 

Classifi
-cation 		Signal Installation Section
1龋林 2龋林 3龋林 4龋林 5龋林
3display Stop
(R)		 Caution
(Y)		 Go
(G)		 Go
(G)		 Go
(G)		 Jungang line and other line
4display Stop
(R)		 Stop
(R)		 Caution
(Y)		 Reduce
Speed
(YG)		 Go
(G)		  Metropolitan line (Gyeongbu, Gyeongin, Gyeongwon, Gyeoneuy, 
Ansan line)
5display Stop
(R)		 Warning
(YY)		 Caution
(Y)		 Reduce
Speed
(YG)		 Go
(G)		 Gyeongbu line (Seoul-Busan)


Automatic Train Stop(ATS)
Device that automatically stops train when train operates while dismissing signal
Ground point control system: Operates when stop signal displayed
Continuous speed control system : Operates when train runs over speed limit


Installation Status
Type Numbers of Lines Extension (km) Numbers Of Stations Note
Total 38lines 3,119.9 481

Overlaps with continuous speed control system : 119.2km

- Gyeongbu line

41.5km

- Gyeongin line

27.0km

- Gyeongwon line

31.2km

- Ansan line

19.5km

Ground point control system 38lines 2,721.7 481
Continuous speed control system 4lines 522.2 92




Installation Status by Line
Line Section No. of Stations Extension
(km)		 Number of Facilities Note
Total 481 3,119.9 5,132
Gyeongbu Seoul-Busan 69 444.3 2,059
Gyeongin Guro-Incheon 5 27.0 630
Gyeongwon Yongsan-Sintanri 15 88.8 338  
Chungbuk Jochiwon-Bongyang 16 115.0 99
Honam Daejeon-Mokpo 37 256.3 292
Jeolla Iksan-Yeosu 31 199.7 130
Janghang Cheonan-Janghang 21 143.1 96
Jungang Cheongnyangni-Gyeongju 73 387.2 379
Taebaek Jecheon-Baeksan 21 103.5 143
Yeongdong Yeongju-Gangneung 32 193.6 151
Gyeongchun Seongbuk-Chuncheon 14 87.3 54
Gyeongjeon Samrangjin-Songjeongri 36 315.2 177
Donghaenamb Busanjin-Pohang 27 145.8 138
Others
84 613.1 446


Installation Status by Line
  A device enabling safe operation of train continuous operation in a electric or
mechanical method between signals, track transformers and route circulations
within station.


Installation Status
Classification No. of Facilities
(stations)
 		Installation Rate Note
Total 481 100%  
Electronic Interlocking Device 56 11.6% Jungang line : 53 stations
Gyeongbu line : 3 stations
Electric Interlocking Device 403 83.7%  
Mechanical Interlocking Device 32 6.6%