Geometrical Design Of Highways

The phase of highway design which deals with the visible elements of different highways is called feometrical design of highways.

A proper geometrical design of a highway essential before its actual construction to provide speed, safety and comfort to the road users.

The following ideals should be kept in view while doing the geometrical design of a highway :-

1. There should be proper record of survey work done in the field.
2. There should be sufficient cross-sectional dimensions such as carriageways width, formation width, right-of-way, etc.
3. The road alignment should be economical.
4. There should be easy gradient.
5. There should be adequate camber  on straight portion of the road.
6. there should be proper superlevation on curved portion of the road.
7. There should be efficient drainage system.
8. There should be provision of proper curves.
9. There should be provision of extra roads width on curves.
10. There should be provision of sufficient sight distances available on curves.
11. There should be provision of *road signals, particularly at **road junctions.
12. Estimated cost of the project should also kept in view.