C’est réglé, j’imagine ils postent sur Twitter d’abord avant de mettre à jour le site
Haha yess. Excellent timing.
Tu veux dire le service est revenu à la normale?
Non je parlais de la mise à jour du site! Les fréquences sont encore de 40 minutes 
Je me demande s’il y a foule à Brossard compte tenu du 40 mins de fréquence.
Ah 
Nope, le train demeure vide, je compte 5 personnes dans le train
Un train commence à déneiger l’autre voie
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Looking at this video, we can see that it seems to the older type of heater, specifically a hot air blower heater. I found a similar model from This manufacturer.
According to the maker, this unit can heat the rail up to 138 degrees celsius. That seems like it would be more than enough. Maybe they’re not running them at full power?
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I haven’t seen the plows in question, but logic dictates that the snow plow can only go down as far as the surface of the rail. Any lower and it would interfere with the switches when changing direction. The plows basically can’t do anything to clear the switches of snow.
J’ose pas imaginer une technologie de train a plancher bas pour le REM. Avec la neige bonjour les problemes.
A Toronto un tramway a carrément dérailler a cause de la neige.
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En effet. Via les caméras du pont.
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Update: a platform screen door stopped responding at Du Quartier. Indefinite hold.
Maintenance staff is disassembling a platform
screen door module currently
Talked to staff and they said they’ve been having nothing but problems today
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Est-ce que les trains sont still running? Est-ce qu’ils sont encore conduits manuellement?
Why would you say it is an “older type of heater”. Do you know of any newer ones?
All the heaters on REM are natural gas. You can see the yellow piping in one of your pictures. The image you posted is electric - but looks the same. Basically, the lowest capacity natural gas unit (400 kBTU) is twice as powerful as the highest power electric unit (60kW).
These blowers have two types of nozzles:
- Nozzle - points towards the tip of the switch to melt ice/snow at the point of the switch.
- Longitudinal diffuser - spreads out the heat to clear the whole area of snow.
Even a couple of millimeters of ice in the wrong place will stop a switch from correctly reporting its position.
Yes this is true. But there is also no need to remove snow any lower than the top of the rail. If you tried, the signalling balises (the yellow boxes between the tracks) and other components between the rails would be ripped away.
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With the wind, snow will blow into the smallest of crevices. If there’s any opening, snow will find it. My guess is that this could explain a lot of the problems experienced today.
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It seems like newer ones on the market use induction heating as opposed to air, which is much more efficient. This company, which was previously mentioned in the thread by @Andremd , touts several advantages over hot air systems. Once again, i’m not a right-of-way engineer or anything, im not sure of the specifics, it just seems like the switch heaters are not doing their job, and perhaps should be beefed up. Its also possible that this was an operational mistake, such as them not leaving the heaters on during the night or the weekend, in which case GPPM may have to revise these procedures.
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Le vent souffle très fort dans Griffintown.
Les traces de pas que j’ai laissées dans la neige de mon balcon ont été recouvertes en moins de 10 minutes…
Induction heaters are something else. In the metallurgical industry, they are commonly used to heat metal red hot before the quenching process. They could get the rail to the target temperature in a matter of seconds. There really isn’t much of anything that can get the job done anywhere near that quickly.
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I saw the post about the induction heater after I replied - my bad.
The induction heater states that it uses 5kW for a typical switch which is certainly less than an electrical hot air blower.
Is it better ? The blower-type heaters are considered tried-and-true.
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