Highway Engineering
The critical combination of stresses for corner region in cement concrete roads is

Load stress + frictional stress
Load stress + warping stress
Load stress + warping stress + frictional stress
Load stress + warping stress frictional stress

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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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