Factors affecting the alignment of the highway
Alignment is one of the main factors that you need to consider while designing a road. Here we are going to describe some main factors affecting highway alignment during the construction of roads.
1. Obligatory points
They are the control points through which alignment has to pass and not to pass. For example, the road bridge across a river can be located only at a place where the river has a straight and permanent path, away from the bends, where good foundation start is available.
Alignment should pass along a hillside (if possible) so that a tunnel or heavy cutting is unavoided.
Origin and destination studies are conducted and desire lines are drawn.
3. Geometric design
Gradient, Radius, Sight distance
Balance in cutting and filling.
5. Other considerations
Drainage, hydrology, political, topography, etc..
These are the factors affecting highway alignment during the construction of roads.
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