▁District ▁line ▁are ▁also ▁in ▁the ▁Loop . ▁All ▁stations ▁in ▁the ▁Loop ▁are ▁in ▁Zone ▁A ▁for ▁fare ▁collection ▁purposes . ▁The ▁inter urban ▁South ▁Sh ore ▁Line , ▁which ▁goes ▁to ▁South ▁B end , ▁Indiana , ▁has ▁its ▁Chicago ▁terminal ▁at ▁Mill en ni um ▁Station . ▁ ▁All ▁lines ▁of ▁the ▁Chicago ▁" L " ▁except ▁the ▁Y ellow ▁Line ▁serve ▁the ▁Loop ▁area ▁for ▁at ▁least ▁some ▁hours . ▁The ▁State ▁Street ▁Sub way ▁and ▁D ear born ▁Street ▁Sub way , ▁respectively ▁parts ▁of ▁the ▁Red ▁Line ▁and ▁Blue ▁Line , ▁are ▁present ▁in ▁the ▁Loop ▁area ▁and ▁offer ▁ 2 4 / 7 ▁service ; ▁the ▁Red ▁and ▁Blue ▁L ines ▁are ▁the ▁only ▁rapid ▁trans it ▁lines ▁in ▁the ▁United ▁States ▁outside ▁of ▁the ▁New ▁York ▁City ▁and ▁Philadelphia ▁metropol itan ▁areas ▁to ▁offer ▁such ▁service . ▁Bus ▁Rap id ▁Trans it ▁has ▁been ▁implemented ▁in ▁the ▁Loop . ▁ ▁Private ▁transport ation ▁and ▁roads ▁ ▁Chicago ' s ▁address ▁system ▁has ▁been ▁standard ized ▁as ▁beginning ▁at ▁the ▁intersection ▁of ▁State ▁and ▁Mad ison ▁Stre ets ▁since ▁September ▁ 1 , ▁ 1 9 0 9 . ▁Prior ▁to ▁that ▁time , ▁Chicago ' s ▁street ▁system ▁was ▁a ▁h odge pod ge ▁of ▁various ▁systems ▁which ▁had ▁resulted ▁from ▁the ▁different ▁municipal ities ▁that ▁Chicago ▁an nex ed ▁in ▁the ▁late ▁ 1 9 th ▁century . ▁The ▁implementation ▁of ▁the ▁new ▁street ▁system ▁was ▁delayed ▁by ▁two ▁years ▁in ▁the ▁Loop ▁to