The REM Was Supposed to Open in 2023. It Found Century-Old Explosives. Then It Held Commuters Hostage.

The Réseau express métropolitain was announced as Montreal’s transit transformation. A $8.34 billion automated light metro system connecting the South Shore, the West Island, the North Shore, and the airport to downtown. The project was presented as the solution to Montreal’s chronic transit inadequacy. The alternative to the pink line that Valérie Plante replaced with this. The original completion target was 2023. It is now 2026. Nineteen of twenty-six stations are in service. The airport branch opens in 2027. The Anse-à-l’Orme branch was pushed to the second quarter of 2026. The project cost is $8.34 billion and rising. Along the way the REM found century-old explosives in the Mont-Royal tunnel. Shut down completely for months at a time for testing. Experienced service disruptions on the first three days of operation. Held South Shore commuters hostage through a non-compete clause that eliminated their bus alternatives. And prompted the mayor of Brossard to publicly demand the return of the buses that the REM’s own contract had removed. The Explosives In November 2020 CDPQ Infra held a press conference to announce that century-old explosives had been found in the Mont-Royal tunnel during construction. The tunnel structure had also deteriorated significantly beyond what was anticipated. These two factors combined to push back the timeline for the northern and western branches of the system repeatedly. The tunnel was originally a commuter rail corridor. Converting it to automated light metro standards while managing structural deterioration and historical munitions required engineering responses that the original project timeline did not account for. Which is a reasonable explanation for delay. Unexpected conditions produce unexpected timelines. What is less reasonable is presenting completion targets with confidence while those conditions were known to exist. The 2023 target became 2024. The 2024 target became 2025. The 2025 target for the Anse-à-l’Orme branch became Q2 2026. Each delay was announced with confidence that the next date would hold. The Shutdowns To test the new branches the REM required shutdowns of the existing operational line. Weekend service was stopped from February to mid-September 2025. From July 5 to August 17, 2025 the entire REM shut down completely to enable testing of the central section. Shuttle buses replaced the train service during these periods with costs covered by CDPQ Infra. Which means South Shore commuters who had relied on the REM since 2023 had their transit service replaced by buses for months in 2025. The same commuters whose bus alternatives had been eliminated by the REM’s non-compete clause. The Non-Compete Clause The REM’s operating agreement includes a non-compete clause that eliminated existing bus lines serving the same corridors. The 45 and 90 bus lines that transported South Shore residents over the Champlain Bridge into downtown Montreal were removed when the REM launched. When the REM experienced multiple service disruptions in February 2025 the mayor of Brossard, Doreen Assaad, called publicly for the return of those bus lines. She said the situation was forcing exclusivity and holding everybody hostage. Which is the specific consequence of removing backup transit infrastructure before the replacement system has proven reliability. South Shore commuters had one option. When that option failed they had shuttle buses. Which are not the same as a transit network that was functioning before the REM contract removed it. The REM is a private concession operated by CDPQ Infra, the infrastructure subsidiary of the Caisse de dépôt et placement du Québec. The pension fund that manages Quebec’s public retirement savings built a transit system with a non-compete clause that eliminated existing public transit options and left commuters dependent on a system that then required months of shutdown to complete testing. The $8.34 Billion Question The REM costs $8.34 billion and is not yet complete. The airport branch opens in 2027. Cost overruns have been expected and reported at multiple stages of the project. The project was originally criticized in a 2017 environmental assessment report for failing to provide crucial information on its financial model, environmental impact, and impact on ridership levels on existing transit systems. Which means before construction began the questions about financial transparency were already documented. The project proceeded. The questions were not resolved. The costs exceeded projections. The timeline exceeded projections. Meanwhile the Deux-Montagnes commuter train line that served the North Shore was shut down in January 2021 to allow conversion to REM standards. North Shore commuters lost their train service and waited years for the REM to open. The branch finally opened in November 2025. Four years without a train. For residents who had nothing to do with the REM’s tunnel explosives or its testing schedules. What the REM Actually Delivered The system carries approximately 45,000 passengers on its busiest days as of early 2025. The South Shore to downtown connection is functional and represents genuine transit improvement for that corridor. Which is real. The REM works for the people it currently serves. But it replaced a commuter rail network that served the North Shore, eliminated the bus alternatives that served the South Shore, held those commuters to a non-compete clause during extended shutdowns, delayed its full opening by at least four years from the original target, and cost $8.34 billion in a province running a deficit of $13.6 billion. Quebec needed transit infrastructure. The REM delivered partial transit infrastructure at significant cost and timeline overrun while removing existing alternatives and leaving commuters with no backup when the new system required months of shutdown. Which is the Quebec infrastructure pattern this platform has documented across every sector. The announcement was ambitious. The delivery is partial. The people who depended on it absorbed the consequences of the gap. SIIIOCULI — Intelligence. Sovereignty. Awareness. siiioculi.lilxbrxaker.com