- Within the spring, a rigorous evaluation course of was carried out in partnership with worldwide specialists to realize a greater understanding of the sources of noise.
- The ensuing prognosis confirmed an unsatisfactory noise impression in sure areas between Île-des-Sœurs and Central Station.
- Two confirmed options can be rolled out: finishing up acoustic grinding alongside the complete section and putting in dynamic dampers on main sections of the route close to residential areas.
- A big discount in whole noise depth of 5 to 10 dB on the supply is anticipated. Usually, such a discount is equal to a 3 to 10-fold lower within the degree of noise emitted in comparison with the present state of affairs
MONTRÉAL, Sept. 25, 2023 /CNW/ – Media representatives had been invited to a technical presentation of the outcomes of an evaluation carried out by acoustics specialists on the REM section in service, in addition to on the mitigation measures to be rolled out in Griffintown, Pointe-Saint-Charles and Île-des-Sœurs.
“As we’ve stated earlier than, we aren’t joyful concerning the noise attributable to REM operations in sure areas. Over the previous couple of months, we’ve adopted a strategic method, with the assist of worldwide specialists, to ascertain a prognosis that can now allow us to implement confirmed options. These can be intently monitored to make sure that our noise discount targets are met,” stated Jean-Marc Arbaud, President and Chief Government Officer of CDPQ Infra.
Starting within the design part, noise impression modelling and the next planning for obligatory mitigation measures was carried out for the REM. As well as, on the mission’s inception, a program was applied to watch noise ranges throughout operations.
Nevertheless, following discussions with residents in sure areas, Projet REM s.e.c. launched a brand new noise measurement initiative to realize a transparent understanding of the present state of affairs and decide the measures to be taken based mostly on the outcomes. SYSTRA was commissioned to hold out the evaluation.
A complete of seven sound degree meters had been put in in residential areas in Île-des-Sœurs, Pointe-Saint-Charles and Griffintown to constantly measure the impression of the REM. The info collected reveals that the state of affairs varies from one space to a different. Griffintown and Île-des-Soeurs present greater ranges than these indicated by preliminary modelling.
REM operations are carried out in compliance with the regulatory framework set by the Québec authorities, together with the Politique sur le bruit routier by the Ministère des Transports du Québec et de la Mobilité sturdy (MTQMD), in line with the factors relevant to the mission.
Worldwide specialists from SYSTRA concluded that the principle sources of noise are:
- The transmission of vibrations from the observe to the elevated construction, which creates a rumbling noise
- Contact between automobile wheels and the observe, which generates a rolling noise
Primarily based on its worldwide expertise in transit techniques, the crew of specialists beneficial confirmed noise discount measures that may be utilized immediately on the supply: finishing up acoustic rail grinding and putting in dynamic absorbers on main sections of the route close to residential areas.
Following the implementation of those two measures, a discount in whole noise depth of 5 to 10 dB on the supply is anticipated. Typically talking, such a discount is equal to a 3- to 10-fold lower within the degree of noise emitted in comparison with the present state of affairs.
In early November, acoustic rail grinding can be carried out on the complete section between Île-des-Sœurs and Central Station, persevering with so far as Brossard station. Dynamic absorbers can be put in progressively from mid-October to December. REM customers and native residents will obtain extra particular details about these measures within the coming weeks.
The potential of including further noise boundaries was additionally examined. Nevertheless, given the peak of the constructed surroundings, this measure will not be thought of to lead to important acoustic enhancements.
Projet REM s.e.c. will proceed to watch noise to make sure that noise discount targets are met, and can share the outcomes publicly.
The technical presentation is accessible by clicking on this hyperlink: https://rem.data/en/documentation.
The Réseau categorical métropolitain (REM) is a brand new, 67 km built-in public transit community of 26 stations that can hyperlink downtown Montréal, the schools, the South Shore, the West Island, the North Shore and Montréal–Trudeau airport by way of a totally automated, electrical mild metro system. The primary section of the community, between Brossard and Gare Centrale Station, has been in service since July 31, 2023. Providing high-frequency service, the REM will function 7 days per week, 20 hours per day, and can be related to the three essential traces of the Montréal metro.
SOURCE CDPQ Infra Inc.
For additional info: Emmanuelle Rouillard-Moreau, Advisor, Media Relations, Réseau categorical métropolitain, 514-847-2896,