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For Subcarpathia, aside from the aforementioned HSL for Stalowa Wola and Rzeszów, there's the idea of using a line that supplies a power plant in Połaniec on the Vistula as the base of a new Kielce-Rzeszów corridor connecting Mielec and Kolbuszowa. The shadow plan opts for just Połaniec-Mielec and a curve bypassing Dębica for the Rzeszów connection, which seems like a more economical option unless traffic on the Kraków-Rzeszów-Przemyśl trunk gets really bad - and even then the gov plan envisions upgrading it to 250, which ought to put quadruple-tracking into consideration, I think?
In the south, the proposals are a curve allowing trains from Rzeszów to turn towards Krosno without having to trek several kilometers west to Jasło and back, and a Wisłoka valley line between Dębica and Jasło (which they apparently see some interregional traffic on), as oppsed to the shadow project's Rzeszów-Krosno and Rzeszów-Sanok tunnel-fests.
Both plans recommend cutting the detour between Stalowa Wola and Sandomierz/Metan that exists probably solely because that's where the Austria-Russia border was back when that system was being built.
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