▁Stuttgart ▁to ▁other ▁cities ▁with ▁the ▁improvement ▁of ▁local ▁infrastr ucture ▁and ▁replacement ▁of ▁the ▁current ▁terminal ▁station . ▁The ▁current ▁ 1 7 - track ▁station ▁is ▁to ▁be ▁replaced ▁by ▁an ▁under ground ▁ 8 - track ▁through ▁station . ▁ ▁The ▁new ▁tracks ▁are ▁planned ▁to ▁cross ▁below ▁ground ▁at ▁right ▁angles ▁to ▁the ▁northern ▁end ▁of ▁the ▁existing ▁building . ▁Part s ▁of ▁the ▁historic ▁Paul ▁Bon atz ▁Haupt bahn hof ▁building , ▁the ▁platforms ▁and ▁approach ▁tracks ▁would ▁be ▁demol ished , ▁and ▁the ▁land ▁sold ▁for ▁development . ▁ ▁The ▁plans ▁include ▁new ▁surface ▁and ▁under ground ▁lines ▁connecting ▁the ▁station ▁in ▁Stuttgart ’ s ▁en closed ▁central ▁valley ▁with ▁existing ▁lines . ▁The ▁Stuttgart – W end lingen ▁high - speed ▁line ▁running ▁through ▁a ▁new ▁tunnel , ▁the ▁Fil der ▁T unnel , ▁would ▁connect ▁the ▁replacement ▁Haupt bahn hof ▁with ▁a ▁new ▁Fil der ▁station ▁( F ilder bahn hof ), ▁serving ▁the ▁Airport , ▁the ▁M esse ▁( tra de ▁fair ) ▁and ▁the ▁Fil der stadt ▁district . ▁The ▁line ▁would ▁then ▁connect ▁to ▁the ▁planned ▁Wend lingen - U lm ▁high - speed ▁line . ▁ ▁The ▁carriage ▁sid ings ▁would ▁be ▁moved ▁to ▁the ▁area ▁of ▁Unter t ür k heim ▁station ▁to ▁clear ▁land ▁for ▁re development . ▁ ▁On ▁ 2 ▁April ▁ 2 0 0 9 ▁the ▁Premier ▁of ▁Baden - W ür ttemberg , ▁Gün ther ▁O et ting er , ▁signed ▁the ▁fin ance ▁agreement