Highway Engineering
Scientific planning of transportation system and mass transit facilities in cities should be based on

traffic volume data
spot speed data
origin and destination data
accident data

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Highway Engineering
For a constant value of coefficient of lateral friction, the value of required super-elevation increases with

decrease in speed and with increase in radius of curve
increase in speed and with decrease in radius of curve
decrease in both speed and radius of curve
increase in both speed and radius of curve

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