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Question
Control points governing the alignment of the highways are called
A.
Topographic points
B.
Obligatory points
C.
Alignment points
D.
Road line points
Answer ( Option B)

Obligatory points

Solution

Factors affecting highway alignment are:
1. Obligatory point.
2. Trafic.
3. Geometry design.
4. Economy.
5. Other consideration.
Obligatory point:
• Obligatory point through which Alignment is to pass 
Example: Bridge site, Intermediate town, Mountain pass, etc. so to connect obligatory point the alignment should be changed.
• Obligatory point through which alignment should not pass 
Example: Religious places, costly structure, etc.
Obligatory points in highway engineering are controls points governing the alignment of highways.

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