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

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Highway Engineering
Centre line markings are used

in roadways meant for two way traffic
to designate proper lateral placement of vehicles before turning to different directions
to indicate that overtaking is not permitted
to designate traffic lanes

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