Highway Engineering
When the bituminous surfacing is done on already existing black top road or over existing cement concrete road, the type of treatment given is

Spray of emulsion
Tack coat
Seal coat
Prime coat

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Highway Engineering
The entrance and exit curves of a rotary have

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

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