5. Example 2.13:

Try these first

1. 1.

   What is the formula for calculating tangent length?

   Hint

   Remember what R and Δ stand for.

2. 2.

   Define the term 'chainage'.

   Hint

   Think about how distances are measured in surveying.

3. 3.

   What does the tangent length represent in curve setting?

   Hint

   Think about where the curve starts in relation to the intersection.

4. 4.

   Is the formula for arc length l = πRΔ/180 true or false?

   Hint

   Revisit the section on calculating arc lengths.

5. 5.

   Calculate the tangent length for a curve with radius 250 m and deflection angle 45°. How would this impact road design?

   Hint

   Focus on correctly applying the tangent length formula.

6. 6.

   A project requires curves of varying radius: one at 400 m with Δ = 90° and another at 600 m with Δ = 80°. What are their curve lengths?

   Hint

   Break it into smaller calculations, ensuring correct units for angles.