Highway Engineering
Length of a vehicle affects

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

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Highway Engineering
Centre line markings are used

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

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