This morning, Montrealers had to deal with yet another STM shutdown on the Green Line between Angrignon and Honore-Beaugrand. All stations on one of the city's busiest metro networks were shut down from 9:45 AM to 10:30AM.\nPeople took to Twitter to demand the origin of the strange smell that was coming from many Green Line stations. Apparently, the system was shut down due to the presence of smoke. STM investigators quickly arrived on scene to find the source of the problem.\nThey first announced that the shutdown would only last 15 minutes but as per tradition, that 15 minutes became 45 minutes.\nIncreased bus service between Berri-Uqam and Honore-Beaugrand ferried people to their destinations while the Orange Line saw an influx of trains to help alleviate high traffic congestion.\nTwitter users expressed their frustrations but the STM was quick to provide riders with constant updates on the situation.\nSmoke was released by brakes at Préfontaine métro station. Since these are made of wood and impregnated with peanut oil, it is the smell that you have felt— Ligne Verte (@stm_Verte) May 22, 2019\nApparently, the source of the problem is brakes that are "impregnated with peanut oil". Odd choice of phrasing aside, the STM was very transparent with angry metro riders who were definitely running late.\nShutdown GREEN line between Atwater and H-Beaugrand. Presence of smoke. Service expected to resume at 10:14. #stminfo W— Ligne Verte (@stm_Verte) May 22, 2019\nAt first, they announced that the metro would re-open at 10:05AM, then at 10:15AM, and now...well:\nShutdown continues GREEN line between Atwater and H-Beaugrand. Presence of smoke. Service expected to resume at 10:30. #stminfo G— Ligne Verte (@stm_Verte) May 22, 2019\nThe STM updated every 15 minutes it seems and service is now expected to resume at 10:30AM. Needless to say, people along the Green Line will have to find a new way to travel this morning.\nREAD ALSO: Montreal's Entire STM Green Metro Line Is Shut Down Due To The Presence Of Smoke\n[Ongoing disruption] 🚇⚠️ Orange line can be an alternative for your travels ⏩ https://t.co/3glbdm5lsL pic.twitter.com/wIEHARTjLI— Ligne Verte (@stm_Verte) May 22, 2019\nAs service slowly begins to resume, people have started to find various alternatives to travel downtown, to the East end, or to Verdun.\nService gradually resuming on the GREEN line. #stminfo K— Ligne Verte (@stm_Verte) May 22, 2019\nIf you've been disrupted this morning make sure that you find a reliable alternative to get to where you need to go.\nAt the time of writing this article, service has gradually begun to resume on the Green Line. Still, expect long wait times between trains.\nAs always, we will keep you updated on the situation as the story develops.\nFor more information, check out Ligne Verte's Twitter page for live updates.