ic ▁project , ▁the ▁G MP TE ▁came ▁up ▁with ▁an ▁alternative ▁proposal ▁for ▁a ▁street ▁based ▁light ▁rail ▁network , ▁which ▁would ▁take ▁over ▁the ▁B ury ▁line ▁( as ▁en vis aged ▁in ▁the ▁Pic c - V ic ▁plan ), ▁and ▁the ▁line ▁from ▁Manchester ▁Pic c ad illy ▁to ▁Al tr inch am , ▁which ▁would ▁be ▁joined ▁by ▁an ▁on - street ▁tram ▁route . ▁This ▁eventually ▁became ▁Ph ase ▁ 1 ▁of ▁the ▁Manchester ▁Met rol ink , ▁which ▁util ized ▁a ▁new - build ▁fleet ▁of ▁ 2 6 ▁light ▁rail ▁vehicles ▁class ed ▁as ▁T - 6 8 ▁and ▁proc ured ▁from ▁An sal do B red a . ▁This ▁fleet , ▁which ▁eventually ▁number ed ▁ 3 2 , ▁was ▁replaced ▁at ▁the ▁end ▁of ▁ 2 0 1 4 ▁by ▁the ▁M 5 0 0 0 ▁type ▁from ▁Bomb ard ier . ▁ ▁Gallery ▁ ▁Notes ▁ 1 . ▁This ▁is ▁similar ▁to ▁the ▁Northern ▁City ▁Line , ▁a ▁short ▁under ground ▁route ▁in ▁London ▁also ▁built ▁for ▁the ▁purposes ▁of ▁access ▁by ▁full ▁s ized ▁rolling ▁stock . ▁However , ▁the ▁diameter ▁of ▁these ▁t unn els ▁is ▁, ▁and ▁thus ▁unable ▁to ▁accommod ate ▁the ▁O H LE ▁w ires . ▁As ▁a ▁consequence , ▁the ▁Northern ▁City ▁Line ▁is ▁elect r ified ▁using ▁ 7 5 0 ▁V ▁DC ▁third ▁rail , ▁and ▁requires ▁the ▁use ▁of ▁dual ▁voltage ▁EM Us . ▁As ▁of ▁ ▁, ▁services ▁on ▁the ▁Northern