▁This ▁is ▁an ▁increase ▁of ▁ 4 7 ▁percent , ▁according ▁to ▁DB . ▁ ▁In ▁the ▁late ▁ 1 9 9 0 s , ▁material ▁defect s ▁were ▁discovered ▁in ▁a ▁number ▁of ▁concrete ▁sleep ers ▁on ▁the ▁line . ▁C ertain ▁elements ▁in ▁the ▁sleep ers ▁decom posed ▁faster ▁than ▁planned , ▁leading ▁to ▁ ▁the ▁replacement ▁of ▁ 2 6 0 , 0 0 0 ▁dam aged ▁sleep ers , ▁forcing ▁the ▁closure ▁on ▁the ▁line ▁between ▁ 1 ▁March ▁and ▁ 1 3 ▁June ▁ 2 0 0 9 . ▁Long - distance ▁trains ▁were ▁di vert ed ▁via ▁St end al ▁and ▁U el zen ▁and ▁regional ▁services ▁were ▁largely ▁replaced ▁by ▁bus es . ▁ ▁Pro spect s ▁ ▁It ▁is ▁currently ▁planned ▁for ▁S - B ahn ▁services ▁to ▁be ▁extended ▁from ▁Berlin - Sp and au ▁at ▁least ▁as ▁far ▁as ▁Fal ken see , ▁including ▁the ▁rest oration ▁of ▁S - B ahn ▁services ▁to ▁Al bre cht sh of ; ▁Regional bahn ▁services ▁would ▁be ▁closed . ▁ ▁Techn ical ▁equipment ▁and ▁special ▁features ▁ ▁Train ▁protection ▁ ▁The ▁section ▁of ▁the ▁line ▁from ▁the ▁ 1 6 . 5 ▁to ▁ 2 7 1 . 0   km ▁marks ▁is ▁equ ipped ▁with ▁the ▁Lin ien zug be e infl uss ung ▁( L Z B ) ▁train ▁protection ▁system . ▁D ri vers ▁receive ▁" elect ron ic ▁vision " ▁of ▁the ▁line ▁up ▁to ▁ 1 0 , 0 0