Railway Engineering
The correct relation between curve lead (CL), switch lead (SL) and lead of cros¬sing (L) is given by

SL = L + CL
L = (CL+SL)/2
L =CL-SL
CL = L – SL

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Railway Engineering
Heel divergence is

Equal to flange-way clearance
Always less than flange-way clearance
Sometimes greater than flange-way clearance
Always greater than flange-way clearance

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