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Displaying (1) Comments | Comment on this piece | Report objectionable art
I personally fovuar LRTs over subways unless there is sufficient current and future ridership to justify the latter, but I suspect the fervour for subways (especially in the suburban hinterland where I live) is that based on current experience with the TTC subways offer the best service in terms of speed and capacity but also have no impact to existing roadways. Much of the negative arguments against TC seems to be in terms of the existing streetcars lines running in mixed traffic that is the TC LRT lines will be nothing more than slow-running streetcars, with the added insult of creating more traffic congestion (this image was once again brought to mind as I pedal westbound on Gerrard St E, watching motorist gunning past a streetcar just ahead of me).Steve, has there been posted anywhere the project operating speeds for the LRT lines? I'm guessing a lot faster than the often stated 17 kph? I'm assuming the TTC might be able to operate LRVs at roughly subway speed along the underground section of the Eglinton line (I watch the speedometer of a T1 reach 62 kph between stations)?Steve: There are speeds given in the materials for each line's EA. Eglinton will operate like a subway, although it is important to remember that the stations, especially west of Yonge, are spaced more like the old part of the BD line than on the Sheppard subway. Station spacing is one of the primary constraints on operating speed. One reason that subway and LRT vehicles are not built to run at 100kph is that the stations are too close together to make such performance worthwhile.Don't forget that 17kph is the average speed including stops. Many surface routes have no trouble achieving that sort of speed.The BD subway manages 31-33kph while the SRT does 35-37kph. The difference is mainly in the average stop spacing (those two 2 km gaps from Kennedy north to Ellesmere really help), as well as shorter terminal times. The Sheppard subway at 29.8 kph is actually slower than BD because the terminal layovers dominate on this short line enough to offset the wider station spacing.Anyone looking at TTC service summaries should note that the subway and RT show 0 for the terminal time on all lines at all periods of operation, and the average speed given in the summaries includes the, at times, substantial layovers at terminals. The surface routes show the terminal times separately, and the speeds shown in the summaries are only for the running time between terminals.
By: | Mar 18, 2012 | Report Comment
rosebud
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