Civil Engineering - Highway Engineering - Discussion

Discussion Forum : Highway Engineering - Section 3 (Q.No. 28)
28.
If the coefficient of friction on the road surface is 0.15 and a maximum super-elevation 1 in 15 is provided, the maximum speed of the vehicles on a curve of 100 metre radius, is
32.44 km/hour
42.44 kg/hour
52.44 km/hour
62.44 km/hour
72.44 km/hour
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.

Prakash said:   5 years ago
The Correct answer is 52.4563.
(2)

Paramjit said:   5 years ago
Simple formula use v^2/127R to get the answer in km/hr.
(1)

Raju said:   5 years ago
Can we derive using formula SSD vt + v^2/2gf.
(1)

Nitin m said:   6 years ago
1 in 15 = 1/15 = 0.0666.
(2)

Waleed said:   7 years ago
@Nikhil.

127 is constant.

Nikhil said:   7 years ago
How 127 comes?

Please explain.
(1)

Virender paul said:   7 years ago
How? I am not getting this. Please explain me.

Vijayan said:   7 years ago
6% - 1 in 15,
Then 6/100=0.06.

Er Abrar Ansari said:   8 years ago
Here is given that means 1 horizontal and 15 vertical it is max. So we know that e+f=v^2/127R.

Then find V = 127R*(e+f)=Ans.
(5)

Nabin majumder said:   8 years ago
e= 1 in 15 then 100/15=6.6667 but how Sumon has calculated the value is .066667.
(3)


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