Question

2) A circular curve of 800 m radius has been set out connecting two straights with a deflection angle of 42°. It is decided, for construction reasons, that the midpoint of the curve must be moved 4 m towards the centre, i.e. away from the intersection point. The alignment of the straights is to remain unaltered.

Calculate:

(1) The radius of the new curve.

(2) The distances from the intersection point to the new tangent points.

(3) The station of the necessary points if the station of the intersection point is (123+2.4), use 30m-chord.

Answer 1