▁near ▁Baden we iler ▁can ▁still ▁be ▁found ▁on ▁maps ▁today ▁as ▁the ▁Bla uen . ▁ ▁The ▁name ▁Bla uen ▁is ▁bor ne ▁by ▁various ▁mountains , ▁hills ▁and ▁settlement s ▁in ▁Germany ▁and ▁Switzerland . ▁In ▁ 1 8 8 0 ▁in ▁his ▁book ▁on ▁Upper ▁German ▁place ▁names , ▁Ober deutsch en ▁Fl urn amen buch , ▁the ▁cultural ▁historian , ▁Michel ▁Buck , ▁made ▁a ▁conne x ion ▁between ▁the ▁name ▁Bla uen ▁and ▁historical ▁min ing ▁activity , ▁by ▁propos ing ▁that ▁name ▁was ▁derived ▁from ▁the ▁word ▁Bla ▁= ▁sm elter y . ▁However , ▁it ▁could ▁also ▁be ▁derived ▁from ▁the ▁blue ▁colour ▁( G erman : ▁Bla u ▁= ▁" blue ") ▁of ▁con ifer ous ▁for ests ▁or ▁the ▁bl u ish ▁h ue ▁of ▁a ▁mountain ▁when ▁seen ▁from ▁a ▁distance . ▁ ▁Access ▁ ▁The ▁High ▁Bla uen ▁Road ▁( H och bla uen straße ) ▁was ▁opened ▁to ▁private ▁vehicles ▁in ▁ 1 9 2 8 . ▁About ▁half ▁the ▁route ▁is ▁in ▁the ▁county ▁of ▁Fre ib urg - H och sch war zw ald . ▁In ▁its ▁north western ▁section ▁it ▁thus ▁be ars ▁the ▁design ation ▁K   4 9 4 8 , ▁in ▁the ▁sout he astern ▁section ▁it ▁runs ▁under ▁the ▁number ▁K   6 3 1 4 , ▁where ▁the ▁W oll bach ▁highway ▁ag ency ▁is ▁responsible . ▁Winter ▁clear ance ▁of ▁the ▁whole ▁route ▁is ▁undert aken ▁by ▁the ▁M üll heim ▁highway