1.2. Deflection Angle D

Try these first

1. 1.

   What is the formula for calculating the tangent length from the radius and deflection angle?

   Hint

   Remember tangent involves the half of the angle.

2. 2.

   Define the term 'chainage' in road design.

   Hint

   It's often measured from a point of intersection.

3. 3.

   What does the deflection angle determine in road construction?

   • The road's color
   • The angle of curves
   • The price of materials

   Hint

   Think about its role in alignment.

4. 4.

   True or False: The radius of the curve affects the tangent length.

   • True
   • False

   Hint

   Consider the dependencies of geometrical measurements.

5. 5.

   Given a radius of 150 m and a deflection angle of 37°, calculate the curve length and tangent length. Then calculate the chainages based on apex chainage of 2000 m.

   Hint

   Remember to convert degrees to radians for the correct calculation!

6. 6.

   A curve with a deflection angle of 30° needs to have its chainage calculated at two points – one at 200 m and another at 250 m from the apex chainage of 1800 m. Calculate both.

   Hint

   Focus on the form of calculation to see how changes affect your outcomes!