2.68. The centre-line of a new road is to be set out through built-up area...

Try these first

1. 1.

   What is the purpose of the centerline in road design?

   Hint

   Think about how roads are aligned relative to surrounding features.

2. 2.

   What does super-elevation help with?

   Hint

   Consider how a car feels when turning quickly.

3. 3.

   What is the primary purpose of super-elevation?

   • To enhance vehicle speed
   • To ensure vehicle stability on curves
   • To increase road width

   Hint

   Consider vehicle dynamics on curves.

4. 4.

   Transition curves are designed to?

   • True
   • False

   Hint

   Think about how abrupt changes affect driving.

5. 5.

   Calculate the length of the transition curve needed for a design speed of 85 km/h and a maximum allowable super-elevation of 1.0 m.

   Hint

   Refer to standard design tables for estimations in urban planning.

6. 6.

   A road will have a deflection angle of 60°. Calculate how the required curvature will change the initial design if a building is present at 50 m to the right.

   Hint

   Consider the spatial relationship constraints and re-calculate accordingly.