1.1. Chainage of Apex V

Try these first

1. 1.

   What is the formula for calculating tangent length?

   Hint

   Refer to the key definitions discussed.

2. 2.

   Define chainage in the context of road design.

   Hint

   Think about how distances are measured from a starting point.

3. 3.

   What is the deflection angle in a circular curve?

   • Angle between two tangents
   • Straight line angle
   • Zero angle

   Hint

   Consider how curves change direction.

4. 4.

   True or False: Tangent length does not depend on the radius of the curve.

   • True
   • False

   Hint

   Think about how a small radius affects the tangent length.

5. 5.

   A roadway has an apex with a deflection angle of 90° and radius 250 m. Calculate the tangent length and chainage.

   Hint

   Apply tangent length formula first.

6. 6.

   A design requires a curve length of 300 m with a given radius of 1000 m. Determine the deflection angle.

   Hint

   Rearrange the curve length formula for Δ.