Highway Engineering
The particular places where pedestrians are to cross the pavement are properly marked by the pavement marking known as

stop lines
crosswalk lines
lane lines
turn markings

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

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

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