# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 6 (Q.No. 2)
2.
If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum deflection angle to locate its junction point, is
1°43' 08"
1°43' 18"
1°43' 28"
1°43' 38"
Explanation:
No answer description is available. Let's discuss.
Discussion:
16 comments Page 1 of 2.

Abhesh kumar yadav said:   9 months ago
The maximum deflection angle of a transition curve is given by the formula:

δ = L^2/6RL.

where:

L is the length of the transition curve.
R is the radius of the circular curve.
l is the length of the tangent.

In this case, L = 90 m and R = 500 m, so the maximum deflection angle is:
δ = 90^2 / 6 * 500 * 90 = 1°43'08".

Therefore, the correct answer is 1°43'08".
(1)

John said:   2 years ago
The correct answer is option A.
(2)

Roy Basak said:   3 years ago
CORRECT ANSWER IS A - 1°43"08' -Cofirmed from textbook

Explanation:

Max Deflection angle = L^2/6RL (this is in radians),
So in degrees, it will be =L ^2/6RL [180/π],
In minutes it will be = 1800 [L^2/RL].
Thus applying this formula we get max Deflection angle = 1°43"08'.

(For those asking where the 573 in the above explanations came from its simply 180/π =573).

Roy Basak said:   3 years ago
CORRECT ANSWER IS A - 1°43"08' -Cofirmed from textbook

Explanation:

Max Deflection angle = L^2/6RL (this is in radians),
So in degrees, it will be =L ^2/6RL [180/π],
In minutes it will be = 1800 [L^2/RL].
Thus applying this formula we get max Deflection angle = 1°43"08'.

(For those asking where the 573 in the above explanations came from its simply 180/π =573).

Dawood khan said:   3 years ago
@Zeshan.

How come 573.25?

ER.MUSKAN said:   3 years ago
LENGTH OF CURVE= π * R * D/180.
(1)

Shivaraj Babar said:   4 years ago
((573*90)/(500*60))=1°43'08".

Adam basha said:   5 years ago
L2/6RL.
500^2/(6*500*90)*(180).
=1'43'7.14".

Karan said:   6 years ago
Here R=90 and L= 500 is given then how can this answer is possible?