Quote:
Originally Posted by MalcolmTucker
Well, the ground based selective powered rail yeah, would be pretty useless. I wouldn't want to put any salt down on it either (but engineers might know differently).
Given that they cost a lot more anyways, I don't think it would ever be done in Ottawa.
Why would it need to be anyways? You are never going to integrate ~125m long trains into a streetscape anyways. Given the headways the system needs to operate at at opening and in the future, the corridor is going to have to be rather separated from surrounding uses.
Just because the rolling stock is going to be low floor doesn't mean it is comparable to relatively low capacity low floor LRT and streetcar implementations elsewhere. It will be the highest capacity low floor system ever built. The only thing close is the still at the conceptual stage SE LRT in Calgary.
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Any system has to be designed with winter in mind. Consider the winter of 2007-08. Had an overhead LRT system been in place, most likely service would have continued normally or with minor delays as the snow would have melted with the continuous operation of the wires by passing trains (it may require running trains overnight). But with a surface-based third rail, there would have been shutdowns at least on 2 or 3 occasions lasting possibly for several days each in certain areas.
The only dangers with an overhead LRT are rare ice storms. They should be designed to hold up to about 25 mm of ice. However, constant operation would have melted some of the freezing rain and reduced the danger there.
Remember, articulated buses are terrible in heavy snow and ice. They should always be pulled after 25 cm of snow has fallen within 12 hours or in poor road conditions, even though that would result in modifying service. A possible snow plan could be:
1) Set detours on side streets for local and express routes (pre-planned for clear details)
2) After the pullout point, reduction in peak period service - i.e. no expresses or school trips since not enough buses would be available, somewhat similar to a Saturday service but more frequent overall (should only be done if school buses are cancelled and the federal government allows optional leave)
3) Shift in service to arterials and Transitways only, reduction/cancellation of local routes (should only be done if schools are closed completely and the federal government is closed, would have been ideal in Ice Storm '98)
4) Temporary suspension of all service (would require an extreme situation, AFAIK has never happened in Ottawa)
The O-Train would be completely separate and open or close on its own, regardless of whether the buses are at full service or not. I believe it has closed a few times due to weather (but not due to snow I don't think, just high winds and flooding).