▁with ▁the ▁German ▁Minister ▁of ▁Transport , ▁Wolfgang ▁T ief ense e ▁and ▁Deutsche ▁Bahn ▁board ▁member ▁Stefan ▁Gar ber . ▁ ▁On ▁ 2 3 ▁November ▁ 2 0 0 9 , ▁it ▁was ▁announced ▁that ▁construction ▁would ▁commence ▁in ▁February ▁ 2 0 1 0 , ▁on ▁condition ▁that ▁the ▁overall ▁costs ▁do ▁not ▁exceed ▁€ 4 . 5 ▁billion . ▁ ▁DB ▁subs idi ary ▁DB ▁Projekt B au ▁is ▁planning ▁the ▁project ▁on ▁beh alf ▁of ▁DB ▁Net ze ▁and ▁DB ▁Station ▁& ▁Service ▁and ▁is ▁its ▁prom oter ▁for ▁the ▁development ▁appro val ▁process . ▁ ▁Deb ate ▁and ▁opposition ▁The ▁Stuttgart ▁ 2 1 ▁project ▁has ▁been ▁a ▁controvers ial ▁issue ▁among ▁polit icians ▁and ▁local ▁people ▁ever ▁since ▁the ▁idea ▁of ▁a ▁through ▁station ▁for ▁long - distance ▁trains ▁– ▁running ▁under ▁the ▁existing ▁station ▁– ▁was ▁first ▁proposed ▁in ▁the ▁mid - 1 9 8 0 s . ▁ ▁Since ▁late ▁ 2 0 0 6 ▁there ▁have ▁been ▁negoti ations ▁between ▁DB , ▁the ▁Federal ▁Government , ▁the ▁Baden - W ür ttemberg ▁Government ▁and ▁the ▁city ▁of ▁Stuttgart ▁over ▁the ▁sharing ▁of ▁the ▁costs ▁of ▁the ▁project . ▁On ▁ 2 8 ▁June ▁ 2 0 0 7 , ▁a ▁high - level ▁conference ▁was ▁held ▁and ▁adj ourn ed ▁between ▁DB ▁chairman ▁Hart mut ▁Me hd orn , ▁Baden - W ür ttemberg ▁Minister ▁of ▁Fin ance ▁Ger hard ▁Str at th aus ▁and ▁Stuttgart ▁mayor ▁Wolfgang ▁Sch uster . ▁At ▁the