17 Questions
What is the relationship between P and W based on the equation P/W = (Sin θ + fCos θ)/(Cosθ - fSin θ)?
P is inversely proportional to W
In the context of the equation v2/(g*R) = e + f, what does 'e' represent?
Rate of superelevation
If the coefficient of lateral friction 'f' is zero, what does 'e' represent in the equation v2/(g*R) = e + f?
Equilibrium superelevation
Considering the equation P*(Cosθ - fSin θ) = W(Sin θ + f*Cos θ), which statement is true?
W is proportional to Sin θ + f*Cos θ
Based on the equation P/W = v2/gR = (Tanθ + f)/(1 - fTan θ), what happens if 'f*Tanθ' is too small?
'v2/(g*R)' remains constant
Why is superelevation typically provided on horizontal circular curves?
To counteract the centrifugal force and prevent skidding
What is the purpose of providing extra widening on the inner side of a horizontal circular curve?
To assist trucks and trailers in off-tracking during low-speed maneuvers
What is the effect of rigid wheel bases on the need for extra widening on horizontal curves?
It necessitates extra widening to accommodate the inner path taken by trailers
Why do drivers tend to move towards the center line while negotiating a horizontal curve?
To enhance visibility and have a clearer view of the road ahead
What factor counteracts the effect of superelevation on horizontal curves?
Rigid wheel base
How does centrifugal force impact vehicle trajectory on horizontal circular curves?
It causes skidding and outward movement of vehicles on curves
What is the purpose of eliminating the crown and rotating the pavement in the context of attaining superelevation?
To achieve positive camber throughout the width of the carriageway
In the context of superelevation, what does 'tangent runoff distance' refer to?
The distance required to eliminate the negative camber on outer side
What are the two methods discussed for eliminating the crown in the process of attaining superelevation?
Raising outer edge with respect to the center line and shifting crown towards outer edge
Why is it important to attain full superelevation on a carriageway?
To achieve a better sight distance for drivers
Which method involves rotating the pavement about the inner edge in order to attain superelevation?
Rotating about inner edge of the pavement
What does 'shifting crown towards outer edge' aim to achieve in terms of superelevation?
Increase positive camber throughout the width of carriageway
Learn about the design process of superelevation including steps to attain positive camber on the outer side of the carriageway. This includes eliminating the crown and rotating the outer portion to achieve the desired level of superelevation.
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