If the rate of change of the super-elevation along a curved portion of a 7 metre wide road is 1 in 150 and the maximum super-elevation allowed is 1 in 15, the maximum length of the transition curve to be provided at either end, is

- 1
  
  65 m
- 2
  
  70 m
- 3
  
  75 m
- 4
  
  80 m

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