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					15-16 Basic Statistics on National Railways in Operation


                          Item                                1985             1990             1995            2000



 Length of Railways in Operation         (km)                     52119           53378            54616           58656
   In Formal Operation                                            49433           50310            50866           51262
   In Temporary Operation                                          2686             3068            3750             7394
 Proportion of the Length in Formal Operation                        94.8             94.3             93.1            87.4
 Double-Tracking Length                   (km)                     9989           13024            16909           21408
 As Percentage of the Length of Railways                             19.2             24.4             31.0            36.5
  in Operation
 Length of Electrified Railways           (km)                     4151             6941            9703           14864
 As Percentage of Railways in Operation                               8.0             13.0             17.8            25.3
 Length of Diesel Engine Routes          (km)                     10822           16097            24749           39497
 As Percentage of Railways in Operation                              20.8             30.2             45.3            67.3
 Length under Centralized Traffic Control (km)                     1307             1169            1226             1200
 As Percentage of Railways in Operation                               2.5              2.2              2.2             2.0
 Automatic Blocking Length               (km)                      6921           10370            12910           18318
 Semi-automatic Blocking Length          (km)                     42625           38832            40859           41695
 Length of Continuous Welded Rail (km)                            10439           14644            21854           29975
 As Percentage of the Trunk Lines                                    16.7             21.7             40.0            51.1
 Relay Interlocking Station             (unit)
 As Percentage of Stations in Operation
 Computer Interlocking Station              (unit)
 As Percentage of Stations in Operation




a) Four indicators of relay interlocking station, percentage to the station in operation, and computer interlocking station, percentage to the st
  operation are increased since 2006.
                    2005            2006          2007



                       62200            63412       63637
                       57589            58901       60032
                        4611             4511        3604
                           92.6            92.9          94.3
                       24497            25244       25794
                           39.4            39.8          40.5


                       19408            23435       24047
                           31.2            37.0          37.8
                       42792            39976       39590
                           68.8            63.0          62.2
                        1828             4181        5322
                            2.9             6.6           8.4
                       24149            25630       26526
                       39390            39145       38563
                       47965            53296       57409
                           54.2            60.2          62.8
                                         4121        3923
                                           73.9          70.8
                                         1299        1487
                                           23.3          26.8




ocking station, percentage to the station in

				
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