Civil Engineering - Highway Engineering - Discussion

Here, it's given RL not staff reading, continuous increase of RL means positive gradient between A and C. So answer must be B.

To understand the gradient between points A, B, and C, we need to analyze the difference in their reduced levels and how the terrain changes from one point to another.

Given data:
Point A: Reduced level = 500 m.
Point B: Reduced level = 505 m.
Point C: Reduced level = 510 m.

The points A, B, and C are 500 m apart, meaning the distances between each pair are:

Distance between A and B = 500 m.
Distance between B and C = 500 m.
Distance between A and C = 1000 m (A to B to C).

Analyzing the gradient:

1. Between A and B:
- The difference in reduced levels between A and B is( 505 - 500 = 5) m.
- Since the reduced level at B (505 m) is greater than at A (500 m), there is a *positive gradient* between A and B. The terrain rises from A to B.

2. Between B and C:
- The difference in reduced levels between B and C is( 510 - 505 = 5) m.
- Since the reduced level at C (510 m) is higher than at B (505 m), there is a *positive gradient* between B and C. The terrain continues to rise from B to C.

Conclusion:
The road between points A and C has a *positive gradient* overall. There is a rise from A to B (positive gradient), and then from B to C, the terrain continues to rise, so the gradient between A and C is positive throughout. There is **no negative gradient** between any of the points.

Thus, the road has *a positive gradient between A and C*.

I think B is the correct answer.

The answer is correct because, they are considering the elliptical shape of the earth, when the distance between A&B is small from A. Then it is a positive gradient, then another 500m additional means, from A, it is far enough, that the RL is low, when seeing from A, since it is a straight line. So, E is right.

The answer given is right.

Two gradients are there A to B, B to C.
Both have the same gradient i.e. 1 in 100.
So, when two gradients are joined, the formula for resulting gradient is, n1 - n2.
So here A to B is a positive gradient ( n1), whereas B to C is a negative gradient (-n).

I think the answer should be (C).

A to C, the RL is increasing. If we consider a fix line of collimation, then the staff should descend so as to increase the staff reading.
The staff reading increases, if the level of ground descends.
I believe It's negative gradient.

Please clarify it.

The correct answer is not mentioned.

The correct answer is, "a positive gradient between A and B followed by C".

Option B is wrong because between is only for two things.

Correct answer is C.

According to me, B is the correct option.

The correct answer is B.