Enrol to start learning
Reading is open to everyone. Enrolling is free, and it is what unlocks the audio lessons, practice tests and progress tracking.
14. Horizontal alignment I
Horizontal alignment is critical for the efficiency and safety of highways, impacting vehicle speed and operational costs. Design considerations encompass the influence of terrain on design speed and the dynamic forces on vehicles navigating horizontal curves, including centrifugal force and friction. Superelevation is employed to counteract these forces, balancing centrifugal force through proper design of road curvature and vehicle speed management.
Sections
This section emphasizes the critical significance of horizontal alignment in highway design, including aspects such as design speed, horizontal curves, super-elevation, and their collective impact on safety and efficiency.
Horizontal alignment affects the speed and comfort of vehicles on highways.
Design speed varies based on road type and terrain classification.
Super-elevation is crucial for maintaining vehicle stability on curves.
Horizontal Alignment
The geometric design of highway pathways that influence vehicle speed and safety.
Super-elevation
The banking of a roadway at a curve, which helps counteract centrifugal forces acting on vehicles.
Design Speed
The speed selected for the design of a roadway, reflecting the type of terrain and the road classification.
Centrifugal Force
A reactive force acting outward on a vehicle navigating a curve, influenced by vehicle speed and curve radius.
Transverse Skidding
A loss of traction that occurs when the centrifugal force exceeds the frictional resistance at the tires.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
Get your answers marked and your progress tracked
Enrol free