Question

 In the Hill roads, if several alternate alignments are surveyed which fulfill the geometric standards, then the preferred alignment is the one which has a resisting length as:

1. Maximum
2. Minimum
3. Very near to average resisting length of all the alignments
4. Zero

Answer 1

Correct Answer - Option 2 : Minimum

Explanation:

Highway alignment:

The centerline layout or position on the ground surface is called Alignment. There are two types of alignment horizontal Alignment and Vertical Alignment.

(i) Horizontal Alignment includes the straight path, curves, or deviation in the horizontal direction.

(ii) Vertical Alignment includes vertical curves and gradient on the ground.

But it is difficult to change the alignment once the road is constructed, so care has to be taken in finalizing the alignment.

Basic Requirement of an Ideal Alignment:

(i) It should have the shortest path.

(ii) The alignment must be easy to construct and maintain and also it should be easy for vehicle operation.

(iii) It should be safe in the case of designing the horizontal and vertical curves.

(iv) The alignment should be selected in such a way that it is economical during construction.