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A pipeline doesn't need viaducts because it doesn't have severe restrictions on curves. It can follow terrain: https://en.wikipedia.org/wiki/File:Trans-Alaska_
by throwaway_yy2Di 13y ago
A pipeline doesn't need viaducts because it doesn't have severe restrictions on curves. It can follow terrain:
https://en.wikipedia.org/wiki/File:Trans-Alaska_Pipeline_System_Luca_Galuzzi_2005.jpg https://en.wikipedia.org/wiki/File:Trans-Alaska_Pipeline_Sys...
A high-speed railway needs to be flat, so it needs tall pylons to support it above uneven terrain:
https://en.wikipedia.org/wiki/File:SNCF_TGV_Duplex_Viaduc_de_Cize_-_Bolozon.jpg https://en.wikipedia.org/wiki/File:SNCF_TGV_Duplex_Viaduc_de...
https://en.wikipedia.org/wiki/File:Millau_Viaduct_construction_south.jpg https://en.wikipedia.org/wiki/File:Millau_Viaduct_constructi...
- Retric 13y agoTrains often need viaducts due to those restrictions but a multi span footbridge over a swamp is a viaduct as is the Disney monorail. My point is simply elevating a span is not that expencive. However, as you say high speed rail needs a vary flat track so cost estimates need to look at the actual path vs just saying 5m/km is rediculus without any justification.