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Cant Formula:
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Cant of a railway track or camber of a road (also referred to as super elevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges. It helps counteract the centrifugal force on vehicles when navigating curves.
The calculator uses the cant formula:
Where:
Explanation: The formula calculates the required cant based on pavement width, vehicle speed, curve radius, and gravitational acceleration to ensure safe and comfortable vehicle movement through curves.
Details: Proper cant calculation is crucial for road and railway design to prevent vehicle overturning, reduce wear on tracks/wheels, and provide comfortable ride quality for passengers.
Tips: Enter pavement width in cm, vehicle velocity in km/h, radius of curve in cm, and acceleration due to gravity in m/s². All values must be positive numbers.
Q1: Why is cant important in road design?
A: Cant helps counteract centrifugal forces on vehicles when navigating curves, improving safety and comfort while reducing wear on tires and road surfaces.
Q2: What are typical cant values for roads?
A: Typical road cant values range from 2% to 10% depending on design speed and curve radius, with higher values for sharper curves and higher speeds.
Q3: How does vehicle speed affect cant requirements?
A: Higher vehicle speeds require greater cant to counteract increased centrifugal forces, making speed a squared factor in the calculation.
Q4: What happens if cant is insufficient?
A: Insufficient cant can cause vehicle instability, increased risk of rollover, passenger discomfort, and excessive wear on outer wheels/tires.
Q5: Are there maximum cant limits?
A: Yes, maximum cant limits are specified in design standards to prevent issues with slow-moving vehicles, drainage problems, and construction limitations.