▁under ▁the ▁B ▁ 1 4 ▁highway , ▁leaves ▁the ▁M urr ▁valley , ▁swing ing ▁south ▁towards ▁Wa ib lingen . ▁The ▁Little ▁M urr ▁line ▁follows ▁the ▁tw isting ▁valley ▁of ▁the ▁M urr ▁to ▁Kirch berg . ▁There after , ▁the ▁line ▁leaves ▁the ▁floor ▁of ▁the ▁valley ▁and ▁after ▁Erd mann hausen ▁runs ▁through ▁a ▁ 2   km ▁long ▁and ▁up ▁to ▁ 1 1 ▁m ▁deep ▁cutting ▁through ▁the ▁waters hed ▁between ▁the ▁M urr ▁and ▁the ▁Ne ck ar . ▁After ▁Mar bach ▁station ▁a ▁s iding ▁branches ▁off ▁to ▁the ▁north ▁of ▁the ▁line ▁and ▁runs ▁to ▁Mar bach ▁power ▁station — until ▁ 1 9 8 9 ▁there ▁was ▁a ▁rem nant ▁here ▁of ▁the ▁former ▁ 7 5 0   mm ▁gauge ▁B ott war ▁Valley ▁Railway ▁( B ott wart al bahn ). ▁ ▁After ▁crossing ▁the ▁ 3 3 5 ▁m ▁long ▁Ne ck ar ▁Vi ad uct ▁over ▁a ▁loop ▁of ▁the ▁Ne ck ar ▁it ▁reaches ▁Ben ningen . ▁From ▁Frei berg ▁the ▁line ▁is ▁now ▁double - track . ▁The ▁line ▁passes ▁through ▁F avor ite park ▁and ▁cross es ▁the ▁B ▁ 2 7 ▁highway ▁to ▁reach ▁Ludwig s burg ▁station . ▁The ▁line ▁runs ▁over ▁a ▁flying ▁j unction ▁over ▁the ▁tracks ▁of ▁the ▁Stuttgart – B iet ig heim - B iss ingen ▁line ▁and ▁ends ▁at ▁Ludwig s burg ' s ▁S - B ahn ▁platforms . ▁ ▁Frei berg ▁B iet ig heim