– B iss ingen ▁line ▁The ▁now ▁abandoned ▁northern ▁route ▁of ▁the ▁Little ▁M urr ▁railway ▁ran ▁from ▁Frei berg ▁further ▁to ▁the ▁west . ▁The ▁A ▁ 8 1 ▁aut ob ahn ▁now ▁cross es ▁over ▁the ▁line ▁on ▁a ▁bridge ▁and ▁near ▁B iet ig heimer ▁Wilhelm sh of ▁and ▁the ▁line ▁runs ▁for ▁ 4   km ▁through ▁depos its ▁of ▁gla cial ▁de br is ▁in ▁c utt ings ▁up ▁to ▁ 1 3 ▁m ▁deep . ▁These ▁c utt ings ▁were ▁at ▁the ▁time ▁of ▁its ▁construction ▁the ▁deep est ▁of ▁their ▁kind ▁in ▁Wür ttemberg . ▁After ▁crossing ▁the ▁line ▁from ▁Stuttgart , ▁the ▁Little ▁M urr ▁line ▁ended ▁on ▁the ▁west ▁side ▁of ▁B iet ig heim ▁station . ▁ ▁History ▁ ▁Background ▁and ▁Pl anning ▁ ▁After ▁the ▁opening ▁of ▁the ▁Wür ttemberg ▁railway ▁lines ▁in ▁the ▁internal ▁expansion ▁of ▁the ▁ 1 8 6 0 s ▁( see ▁History ▁of ▁rail ways ▁in ▁Wür ttemberg ), ▁the ▁cities ▁of ▁Stuttgart , ▁Heil br onn , ▁C rails heim ▁and ▁A alen ▁were ▁connected ▁by ▁a ▁railway ▁that ▁sp anned ▁the ▁northern ▁part ▁of ▁the ▁country . ▁In ▁ 1 8 5 3 , ▁the ▁first ▁east – west ▁route ▁through ▁Wür ttemberg ▁was ▁completed ▁as ▁the ▁Western ▁and ▁Eastern ▁Rail ways . ▁Add itional ▁connections ▁to ▁Bav aria ▁were ▁added ▁with ▁the ▁R ems ▁Railway ▁in ▁ 1 8 6 3 ▁and ▁the ▁Koch er ▁Railway ▁to ▁C rails heim ▁in ▁ 1 8