WorksheetsSuperelevation and Road Design Quiz
Total questions: 14
Worksheet time: 7mins
Superelevation is designed assuming uniform speed, yet it works satisfactorily in practice mainly because:
Vehicles always travel at design speed
Lateral friction compensates for speed variations
Superelevation automatically adjusts with load
Drivers instinctively change lane position
For a given curve radius, if vehicle speed increases by 25%, the required centrifugal balancing force increases by approximately:
25%
50%
56%
62.5%
Which failure is MOST likely if camber is insufficient on a bituminous road?
Skidding
Rutting
Stripping
Fatigue cracking
Assertion (A): Superelevation limits are lower in snow-bound areas. Reason (R): Superelevation increases normal reaction on tyres.
A is true, R is true, R explains A
A is true, R is true, R does not explain A
A is true, R is false
A is false, R is true
Camber is NOT dependent on:
Rainfall intensity
Pavement surface
Traffic speed
Permeability
Which scenario is most unsafe?
High speed + low e
High speed + high e
Low speed + low e
Low speed + high e
Assertion (A): Superelevation is often avoided on urban curves. Reason (R): Urban traffic speed is always low.
A & R true, R explains A
A & R true, R does not explain A
A true, R false
A false, R true
If curve radius is doubled and speed remains constant, centrifugal force becomes:
Same
Half
Double
Four times
Assertion (A): Superelevation is provided even when friction alone can ensure safety. Reason (R): Friction is unreliable and variable.
True
False
If speed reduces by 20%, centrifugal force reduces by approximately:
20%
36%
40%
64%
Which governs superelevation design MOST?
Comfort
Drainage
Vehicle dynamics
Pavement strength
Assertion (A): Straight camber drains water faster at edges. Reason (R): Straight camber provides constant slope across width.
True
False
Why is equilibrium speed NOT used as design speed?
It is too high
It ignores friction variability
It increases construction cost
It reduces comfort
A curve is safe for fast cars but unsafe for bullock carts because:
Cars are lighter
Cars generate higher centrifugal force
Bullock carts move below equilibrium speed
Bullock carts have lower friction
