Highway Engineering
For the construction of water bound macadam roads, the correct sequence of operations after spreading coarse aggregates is

dry rolling, application of screening, wet rolling and application of filler
dry rolling, application of filler, wet rolling and application of screening
dry rolling, application of screening, application of filler and wet rolling
dry rolling, wet rolling, application of screening and application of filler

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Highway Engineering
When the speed of traffic flow becomes zero,then

traffic density and traffic volume both attain maximum value
traffic density attains maximum value whereas traffic volume becomes zero
traffic density becomes zero whereas traffic volume attains maximum value
traffic density and traffic volume both become zero

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