10.1. Two parallel railway lines

Try these first

1. 1.

   What is the formula for calculating tangent length?

   Hint

   Look at the relationship between radius and angle.

2. 2.

   How do you find the chainage at the Point of Curve?

   Hint

   Remember the purpose of chainage.

3. 3.

   What formula is used to calculate the tangent length?

   • A) T = R * sin(Δ/2)
   • B) T = R * tan(Δ/2)
   • C) T = R / Δ

   Hint

   Remember the relationship of tangent to angle.

4. 4.

   True or False: Chainage helps to determine the distance of structures along the railway line.

   • True
   • False

   Hint

   Think about how measurements are tracked in construction.

5. 5.

   A railway line has a radius of 800 m with a deflection angle of 60°. Calculate the tangent length.

   Hint

   Employ trigonometry effectively.

6. 6.

   If the PI is at 2500 m and tangent length is 130 m, find the chainage at the PC.

   Hint

   Be precise with your basic arithmetic.