Railway Engineering
Vertical curves are provided where algebraic difference between grades is equal to or

more than 2 mm/m
less than 4 mm/m
less than 2 mm/m
more than 4mm/m

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Railway Engineering
The treadle bar is provided

near and parallel to inner side of both the rails
in the middle of the track a little in front of the toes of the tongue rail
at right angle to the rail
near and parallel to inner side of one of the rails

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