- min ute ▁intervals ). ▁On ▁the ▁southern ▁route ▁between ▁E ber stadt ▁and ▁Als bach , ▁service ▁intervals ▁are ▁ 1 5 ▁minutes ▁during ▁peak ▁hours ▁and ▁ 3 0 ▁minutes ▁in ▁the ▁even ings . ▁Since ▁many ▁stations ▁are ▁being ▁served ▁by ▁more ▁than ▁one ▁line , ▁service ▁intervals ▁are ▁ 3 ▁to ▁ 7 ▁minutes ▁at ▁the ▁central ▁stations , ▁especially ▁in ▁the ▁city ▁centre . ▁ ▁Rol ling ▁stock ▁The ▁fleet ▁consists ▁of ▁ 4 8 ▁tr ams ▁and ▁ 3 0 ▁tra ilers . ▁ 1 4 ▁new ▁Stad ler - built ▁low - floor ▁tr ams ▁are ▁scheduled ▁to ▁enter ▁service ▁in ▁ 2 0 2 2 . ▁ ▁See ▁also ▁List ▁of ▁town ▁tram way ▁systems ▁in ▁Germany ▁Tr ams ▁in ▁Germany ▁ ▁Bibli ography ▁ ▁Bür n heim , ▁Hermann ; ▁Bur meister , ▁J ürgen ▁( 1 9 9 7 ). ▁Bah nen ▁und ▁Bus se ▁rund ▁um ▁den ▁lang en ▁Ludwig . ▁( Eng l .: ▁Rail ways ▁and ▁B uses ▁around ▁the ▁long ▁Ludwig ) ▁( 4 th ▁ed .). ▁Düsseldorf : ▁Al ba ▁Pub lik ation . ▁. ▁( G erman ) ▁ ▁Schw and l , ▁Robert ▁( 2 0 1 2 ). ▁Schw and l ' s ▁Tr am ▁Atlas ▁Deutschland ▁( 3 rd ▁ed .). ▁Berlin : ▁Robert ▁Schw and l ▁Verlag . ▁. ▁ ▁References ▁ ▁External ▁links ▁▁ ▁HE AG ▁mob ilo ▁- ▁official ▁website ▁▁▁▁▁ ▁Category : D arm stadt ▁D arm stadt ▁Category :