Railway Engineering
If a is the angle of crossing, then the number of crossings ‘N’ according to right angle method is given by

cot(a)
Vi cot(cc/2)
Vi cosec(a/2)
cot(oc/2)

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Railway Engineering
Flange-way clearance is the distance

Between the adjoining faces of the running rail and the check rail near the crossing
Through which the tongue rail moves laterally at the toe of the switch
Between the gauge faces of the stock rail and the tongue rail
None of these

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