km ▁line ▁was ▁opened ▁to ▁the ▁east ▁from ▁ ▁in ▁Kar ls ru he ▁to ▁the ▁town ▁of ▁Dur lach . ▁Because ▁of ▁the ▁greater ▁distance , ▁this ▁line ▁was ▁not ▁horse - h au led , ▁but ▁operated ▁as ▁a ▁steam ▁tram way . ▁After ▁ 1 8 8 1 , ▁the ▁extent ▁of ▁the ▁tram ▁system ▁remained ▁un changed ▁for ▁ 1 9 ▁years . ▁ ▁The ▁horse ▁and ▁steam ▁tr ams ▁had ▁no ▁great ▁commercial ▁success . ▁Although ▁passenger ▁numbers ▁grew ▁stead ily ▁from ▁ 1 . 6 ▁million ▁passengers ▁in ▁ 1 8 8 2 ▁to ▁ 2 . 5 ▁million ▁in ▁ 1 8 9 3 ▁and ▁ 3 . 6 ▁million ▁in ▁ 1 8 9 9 , ▁the ▁financial ▁situation ▁of ▁the ▁company ▁was ▁poor . ▁So ▁the ▁ownership ▁of ▁the ▁tram way ▁changed ▁several ▁times ▁in ▁the ▁early ▁years ▁of ▁its ▁existence , ▁until ▁a ▁permanent ▁solution ▁was ▁found ▁with ▁the ▁found ing ▁of ▁the ▁Verein igte ▁Kar ls ru her , ▁M ühl burger ▁und ▁Dur la cher ▁P fer de - ▁und ▁D amp fb ah ng es ellschaft ▁( Un ited ▁Kar ls ru he , ▁M ühl burg ▁and ▁Dur lach ▁Hor se ▁and ▁Ste am ▁Railway ▁Company ). ▁In ▁ 1 8 9 3 , ▁the ▁company ▁owned ▁five ▁steam ▁locomot ives ▁for ▁the ▁line ▁to ▁Dur lach , ▁ 4 6 ▁horses ▁and ▁ 3 2 ▁carri ages , ▁including ▁ 1 5 ▁for ▁steam ▁operations . ▁ ▁Elect