yes by-passes are created by IR wherever land is available & to ease traffic movement so that loco reversal can be avoided.There is a by-pass in ADRA so that train from ASN to PRLA can avoid reversal,similarly it has been created in HIJ(for Kharagpur),ACC Bhattanagar Chord Link(for SDAH),Kumedpur B Cabin(for New Jalpaiguri),Chanderi(for Kanpur),Panvel(for Mumbai)...but VSKP based members are creating such an issue that ECoR/IR has created only 1 by-pass.