A 2-lane, 2-way highway contains a spiral curve - circular curve - spiral curve which has...

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A 2-lane, 2-way highway contains a spiral curve - circular curve - spiral curve which has been designed to connect two tangents of the horizontal alignment. The speed of this section of the highway is 70km/h. The following design principles are applied: • The superelevation at the circular curve is 6%, • The normal crown has a cross-fall of 2.5%, • The width of a single traffic lane is 3.6m • The length of the transition curve is 120m. a) Calculate the cross-fall for the cross-section of the carriageway at a distance of 30m from TS b) Present a drawing of the carriageway presenting the heights of the outside edge and inside edge of the carriageway relative to the centreline. (Provide all the references used for formulas/table values) A 2-lane, 2-way highway contains a spiral curve - circular curve - spiral curve which has been designed to connect two tangents of the horizontal alignment. The speed of this section of the highway is 70km/h. The following design principles are applied: • The superelevation at the circular curve is 6%, • The normal crown has a cross-fall of 2.5%, • The width of a single traffic lane is 3.6m • The length of the transition curve is 120m. a) Calculate the cross-fall for the cross-section of the carriageway at a distance of 30m from TS b) Present a drawing of the carriageway presenting the heights of the outside edge and inside edge of the carriageway relative to the centreline. (Provide all the references used for formulas/table values)

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a To calculate the crossfall at a distance of 30m from the tangent point TS Superelevation e 6 006 N... View the full answer