smallspy
Senior Member
RER catenary will be VASTLY less susceptible to weather conditions than streetcars currently are.
To the contrary, the RER catenary will be FAR more susceptible to weather conditions than the streetcars are. This has been borne out in almost every operating environment around the world.
Which do you think will have the clearer lines - the one where a train is passing every 15 minutes, or the with a train passing every 5?
The best way to keep the lines free of ice is to simply continue to run trains underneath them, and at frequencies that don't allow the ice to form into any substantial thickness.
Much of the delays/breakdowns of the streetcar system during adverse weather are due to cars getting into accidents during storms shutting down the route. The streetcars have to contend with thousands of cars and hundreds of intersections quite unlike nearly grade separated RER.
You're also making the assumption that the RER will be completely grade separated. Not only is it looking increasingly likely to not be the case, there's also the fact that accidents are just one small part of what can bring the system to a grinding halt.
Conversely, catenary is very susceptible to weather conditions unlike battery {or hydrogen} but not just due to the wires themselves. Catenary systems work perfectly but only when everything else is. That does not just include internal RER infrastructure but also external. A storm may not effect the catenary wires but can very much effect the power going to those wires. Major storms of all types often cause power outages. These are very rarely huge regional events {ie all of the GTA power systems failing} but are common in smaller areas. As an example, the catenaries make be in fine shape in Miss but if there is a power outage in MIss, the entire Lakeshore West line comes to a screeching halt.
Catenary systems are at the mercy of Mother Nature's cooperation.........…of the 3 viable option, catenary is the least reliable when people are relying on it the most. Those catenary trains and hence entire routes are useless unlike if they employed battery or hydrogen where they would continue to work just fine.
How do you charge a battery-powered system, then? If you think that the crew can simply walk over and plug a cable into the side of the equipment, you would be sorely mistaken.
And frankly, I think that you are putting way too much weight into this for the 5 days a year that icing is actually a concern. Catenary is far superior to batteries for the other 99.5% of the year.
Dan