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
Prime coat
Tack coat
Seal coat

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Highway Engineering
With increase in speed of the traffic stream, the maximum capacity of the lane

first decreases and then increases after reaching a minimum value at optimum speed
increases
first increases and then decreases after reaching a maximum value at optimum speed
decreases

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