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

Tack coat
Seal coat
Spray of emulsion
Prime coat

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Highway Engineering
Length of a vehicle affects

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

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