Civil Engineering - GATE Exam Questions - Discussion

Discussion Forum : GATE Exam Questions - Section 1 (Q.No. 4)
On sag (or valley) curves the available sight distance is determined based on :
design speed
height of obstacle
height of driver eye
night-time driving conditions
Answer: Option
No answer description is available. Let's discuss.
34 comments Page 1 of 4.

Tian said:   3 years ago
Yes, right. Agree @Sneha.

Sneha Mathai said:   3 years ago
In a valley or sag curve, the design is based on headlight sight distance only. It is because night time driving is to be taken at almost care in valley curves.

Blackie said:   3 years ago
Yes, D is correct.

Ahsen said:   4 years ago
Should it not be option D?

As there are no visual restrictions on sag curve and the only concern remaining is the glare due to vehicle headlight at night time.

Ismail said:   7 years ago
The valley curve should be designed such that there is enough headlight sight distance. Improperly designed valley curves result in extreme riding discomfort as well as accident risks, especially at nights. The length of valley curve for various cases was also explained in the section. The concept of Valley curve is used in underpasses.

Roy said:   6 years ago
Yes, it's D.

Bapuji pradhan said:   6 years ago
Explain the answer.

Venu gopal said:   6 years ago
Option D is correct I think.

Chanti said:   6 years ago
In summit (hog) curves available sight sight distance is based on SSD.

In valley (sag) curves available sight distance is based on head light distance.

Sachin said:   6 years ago
Yes, I too agree Option D is correct.

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