Highway Engineering
The function of an expansion joint in rigid pavements is to

Relieve shrinkage stresses
Relieve warping stresses
Allow free expansion
Resist stresses due to expansion

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Highway Engineering
Length of a vehicle affects

width of traffic lanes
extra width of pavement and minimum turning radius
clearance to be provided under structures such as overbridges, under-bridges etc.
width of shoulders and parking facilities

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Highway Engineering
The effect of grade on safe overtaking sight distance is

to increase it on descending grades and to decrease it on ascending grades
to decrease it on descending grades and to increase it on ascending grades
to increase it on both descending and ascending grades
to decrease it on both descending and ascending grades

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Highway Engineering
The entrance and exit curves of a rotary have

equal radii but pavement width is more at entrance than at exit curve
different radii and different widths of pavement
equal radii and equal widths of pavement
equal pavement widths but radius is more at entrance curve than at exit curve

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