Standard Track Measurement

 GAUGE

Broad Gauge- 1676mm

  1. On Straight- -6 to +6mm
  2. On curves with a radius of 440 m or more -  -6 to +15mm
  3. On curves with a radius less than 440 m  -  up to +20mm
Meter Gauge- 1 m.
Narrow Gauge- 762 mm or 610 mm.

BALLAST

Ballast size- 50 mm.
Ballast Cushion

  1. On mainline speed less than 50 Km/h- 300 mm.
  2. On mainline speed more than 50 Km/h- 350 mm.
  3. On loop line- 250 mm.

BRIDGE

  1. Gaurd rail gape- 250+1 or 250-1 mm.
  2. Joint sleeper spacing- 100 mm.

CURVE

For 1 degree of curve = 28.57 mm, for 2 degree = 2x28.57=57.14 mm and so on.
  1. Sation to sation versine variation for speed below 140 kmph and up to 110 kmph - 10mm  (15mm for speed of 110 kmph) or 25% of average versine on circular curve whichever is more.
  2. Sation to station versine variation for speed below 110 kmph - 20mm or 20% of average versine on circular curve whichever is more.
  3. Check Rail is required for 8° or above.
  4. Clearance of Check Rail - 44 mm.
  5. Maximum Cant (SE)-165 mm
  6. Maximum Cant Deficiency - 75 mm
  7. Maximum Cant Axcess- 75 mm (Note: Principal Chief Engineer can extend up to 100 mm on Rajdhani & Shatabdi route)

Points & Crossing

  1. Clearance of check rail - 44-48 mm & 41-45 mm (for fan shape crossing).
  2. Through or Opening of Switch is 95-115 mm.
  3. Clearance of Heal Divergence- 182.5 mm for 1 in 8.5 & 175 mm for 1 in 12 crossing.
  4. Wear of Crossing - 8 mm (In Rajdhani or Shatabdi Route) & 10 (In Other Route).

Level Crossing Parametre

  1. LC Gate check rail clearance = 51 to 57 mm
  2. Minimum depth of space for wheel flange from rail level = 38 mm
  3. The vertical clearance of boom from road surface = 0.85 to 1.0 mm
  4. The distance of gate post from the centerline of nearest track = 3 mm
  5. Road signboard from gatepost = 120 m
  6. Speed breaker from gate post = 20 m (within Railway land)
  7. Speed breaker board from speed breaker = 120 m
  8. Height gauge post distance from gate post = 15 m
  9. Heigh of height gauge = 4.67 m
  10. The distance of gate lodge from the centre of nearest track = 6 m
  11. Fencing length on UP and DN side = 15 m
  12. Minimum length of check rail = 2.0 m more than the width of the gate.
  13. Leveled length from gate post = 8.0 m 
  14. Gradient of approach road = 1 in 30
  15. Straight length from gate post = 9.0 m (min)
  16. Distance of whistle board = 600 m
  17. Visibility for train = 600 m
  18. Visibility for road users = 600 m

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