The survey of the highway construction work for preparation of longitudinal and cross sections, computations of earth work quantities; and other construction material and checking details of geometric design elements is carried out in
- AReconnaissance survey
- BPreliminary survey
- CLocation of final alignment
- DDetailed surveyCorrect
Solution
Concept
The detailed survey is done after the final alignment is fixed. It gives L-sections, cross-sections, earthwork quantities and checks on geometric design.
Step-by-step solution
1. Engineering surveys for a highway are done in stages: map study, reconnaissance, preliminary survey, final location, and detailed survey. 2. Reconnaissance is a rough field check of possible routes. 3. The preliminary survey compares alternative alignments. 4. Final location fixes the centre line on the ground. 5. The detailed survey takes levels for longitudinal and cross sections, computes earthwork and material quantities, and checks geometric design details. So the answer is (D).
Explanation
Once the final centre line is fixed, a detailed survey is carried out along it. This survey prepares longitudinal and cross sections and computes earthwork and other material quantities. It also checks geometric design elements before the detailed project report.
Why the other options are wrong
A: Reconnaissance is only a rough study of the route. B: The preliminary survey only compares alternative alignments. C: Final location only fixes the centre line on the ground.
Shortcut
Earthwork quantities and cross sections point to the detailed survey.
Common mistake
Choosing the preliminary survey because it also involves some levelling and cost estimates for alternatives.
Correct answer: D) Detailed survey