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15-16Basic Statistics on National Railways in Operation
  Item
1978
1985
1990
1995
2000
2001
  
  Length of Railways in Operation     (km)
48618
52119
53378
54616
58656
59079
  In Formal Operation                 
45539
49433
50310
50866
51262
54013
  In Temporary Operation              
3079
2686
3068
3750
7394
5066
  Proportion of the Length in Formal    
93.7
94.8
94.3
93.1
87.4
91.4
  Operation                            
        
        
        
        
  Double-Tracking Length              (km)
7630
9989
13024
16909
21408
22640
  As Percentage of the Length of Railways  
15.7
19.2
24.4
31.0
36.5
38.3
  in Operation                    
        
        
        
        
  Length of Electrified Railways      (km)
1030
4151
6941
9703
14864
16877
  As Percentage of Railways in Operation
2.1
8.0
13.0
17.8
25.3
28.6
  Length of Diesel Engine Routes      (km)
6550
10822
16097
24749
39497
40466
  As Percentage of Railways in Operation
13.5
20.8
30.2
45.3
67.3
68.5
  Length under Centralized Traffic Control
        
1307
1169
1226
1200
1163
  As Percentage of Railways in Operation
        
2.5
2.2
2.2
2.0
2.0
  Automatic Blocking Length           (km)
5981
6921
10370
12910
18318
18845
  As Percentage of Railways in Operation
12.3
13.3
19.4
23.6
31.2
31.9
  Semi-automatic Blocking Length      (km)
34759
42625
38832
40859
41695
41336
  As Percentage of Railways in Operation
71.5
81.8
72.7
74.8
71.1
70.0
  Length of Continuous Welded Rail(km)
6530
10439
14644
21854
29975
32502
  As Percentage of the Trunk Lines      
12.2
16.7
21.7
40.0
51.1
39.0
  Number of Stations with Electric      
1336
2320
3535
4587
5232
5288
  Interlocking                    (unit)
        
        
        
        
  As Percentage of Railways Stations    
27.7
46.9
62.9
73.9
90.4
91.6
  in Operation                         
        
        
        
        
        
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