Civil Engineering - Highway Engineering - Discussion
Discussion Forum : Highway Engineering - Section 2 (Q.No. 19)
19.
If N is the algebraic difference of grades, S is the head light beam distance in metres, the length (L) of a valley curve, is
Discussion:
17 comments Page 1 of 2.
Anuj Nehra said:
8 years ago
It is safe sight distance. There is no problem regarding OSD inc ase of valley curve. We consider only head light sight distance which is equal to SSD. And formula used is NS^2/1.5+0.35S.
Chintan said:
1 decade ago
Above comment is wrong correct answer is either based on comfort condition.
i.e 2{(Nv^3)/C}/1/2 or H.S.D that is difference (NS^2)/(1.5+.0355) or 2S-reverse.
i.e 2{(Nv^3)/C}/1/2 or H.S.D that is difference (NS^2)/(1.5+.0355) or 2S-reverse.
Chintan said:
1 decade ago
No its not right answer either it is ns^2/4.4 or ns^2/9.6 but here 4.4 is not given. so correct is ns^2a/9.6.
Pratik said:
6 years ago
Length of valley curve formula is 0.38*√ nv^2.
How this has come? Please explain.
How this has come? Please explain.
Anirban Roy said:
5 years ago
For valley curves;
L= NS^2÷(1.5+0.035S) ; L>S.
L = 2S - N/(1.5+0.035S); L<S.
L= NS^2÷(1.5+0.035S) ; L>S.
L = 2S - N/(1.5+0.035S); L<S.
(1)
Siddhant chauhan said:
9 years ago
Whether, it is safe sight distance or overtaking sight distance? Please tell me.
Dhaval said:
5 years ago
Headlight sight distance means stopping sight distance so answer is Ns^2/4.4.
Garry said:
8 years ago
This should be Ns^2/4.4.
HSD should be at least equal to SSD.
HSD should be at least equal to SSD.
(1)
Rajnish said:
10 years ago
Is it correct answer because formula is ns2/(1.5+0.035s)?
Raj said:
9 years ago
All the options are of summit curve not valley curve.
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