Hi Bill, Am 23.11.2016 um 05:12 schrieb Bill Ricker: > On Tue, Nov 22, 2016 at 10:08 PM, Michael Tsang <mikl...@gmail.com> wrote: >>> Oh really. Boston MBTA green line is a subway line that extends onto >>> surface streets. Not full rail gauge iirc (though other lines are) and >>> neither surface or tunnel curves could handle freight cars. The surface >>> trolley portions that run down boulevard median are direct line >> extensions >>> of the tunnel line but do have grade crossings at boulevard stoplights. >> Then I think it should be railway=light_rail > > > and the way magically transforms to railway=subway at the tunnel portal
In that case, there are overground sections because of a lack of money or because it was just not necessary (no busy city centre, no narrow streets, …). A subway system is *usually* encapsulated. But you should never say no when you talk about railway infrastructure and public transport. This looks much like a tram: https://youtu.be/Fb3thVfqRS8?t=9m44s This is the same line, just about 2 km away. It looks more like railway=subway. https://youtu.be/Fb3thVfqRS8?t=14m24s The Hong Kong case is an execption to the "subways are totally separated" rule because it is a metro using railway=rail tracks. Best regards Michael -- Per E-Mail kommuniziere ich bevorzugt GPG-verschlüsselt. (Mailinglisten ausgenommen) I prefer GPG encryption of emails. (does not apply on mailing lists)
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