A valley curve which is formed by a descending grade of 1 in 30 meeting an ascending grade 1 in 40 for a design speed of 100 kmph. Assume: Driver’s reaction time = 2.5 sec, Coefficient of friction = 0.35 and Allowable Rate of Change of centrifugal Acceleration = 0.6 m/sec3 respectively. Then which of the following is true?
1
Length of valley curve based on comfort criteria is 91.308 m
2
Length of curve based on head light distance is 245.24 m
3
Length of curve based on head light distance is 91.308 m
4
Length of valley curve based on comfort criteria is 181.13 m