0 , ▁ 2 0 0 4 , ▁and ▁it ▁opened ▁in ▁January ▁ 2 0 0 5 . ▁ ▁Equ ip ment ▁ ▁The ▁first ▁cars ▁built ▁for ▁the ▁P & W ▁never ▁ran ▁on ▁the ▁P & W , ▁since ▁the ▁cars ▁were ▁completed ▁before ▁the ▁line ▁was ▁ready ▁to ▁open . ▁ ▁Tw enty - two ▁wooden ▁electric ▁multiple - unit ▁passenger ▁cars ▁and ▁ 2 ▁full - b agg age - config ured ▁M U ' s ▁were ▁built ▁for ▁the ▁P & W ▁by ▁the ▁St . ▁Louis ▁Car ▁Co . ▁in ▁ 1 9 0 6 . ▁ ▁However , ▁due ▁to ▁the ▁San ▁Francisco ▁earth qu ake ▁ 1 2 ▁of ▁them ▁went ▁to ▁M UN I ▁prede cess or ▁United ▁Rail ro ads ▁of ▁San ▁Francisco , ▁ 4 ▁went ▁to ▁the ▁Sac r amento ▁Northern ▁Rail road , ▁and ▁the ▁remainder ▁went ▁to ▁the ▁Er ie ▁Rail road ▁Ro chester - M t . ▁Morris ▁Branch , ▁where ▁they ▁were ▁modified ▁and ▁re w ired ▁for ▁overhead ▁AC ▁operation . ▁ ▁The ▁ 1 2 ▁cars ▁that ▁went ▁to ▁U R R ▁of ▁SF ▁had ▁their ▁bulk head ▁doors ▁se aled ▁and ▁their ▁M U ▁capabilities ▁removed , ▁operating ▁strictly ▁as ▁single - un its . ▁ ▁The ▁ 4 ▁SN ▁cars ▁were ▁converted ▁into ▁motor ized ▁combination ▁b agg age / pass enger ▁cars ▁and ▁used ▁on ▁the ▁Wood land ▁Branch . ▁ ▁The ▁two ▁b agg age ▁cars ▁were ▁accepted ▁by ▁the