7.1. Two straights AC and BC

Try these first

1. 1.

   What is the formula for tangent length?

   Hint

   Remember what the symbols stand for!

2. 2.

   Define chainage in civil engineering.

   Hint

   Think about how we measure distances on a roadmap.

3. 3.

   What does the term 'chainage' refer to in civil engineering?

   Hint

   Think about how distances are laid out in construction plans.

4. 4.

   Is the formula for tangent length correct: L = R * tan(Δ/2)?

   • True
   • False

   Hint

   Recall our discussion about tangent lengths.

5. 5.

   Given a straight path with a radius of 250m and a deflection angle of 45°, calculate the tangent length and chainage at the point of tangency.

   Hint

   Focus on applying trigonometric identities for calculating the tangent length.

6. 6.

   A road segment has a curve with a radius of 500m, and a deflection angle of 90°. Calculate both the tangent length and the total curve length.

   Hint

   Ensure you convert the deflection angle to radians when calculating curve lengths.