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In page High-speed rail:
"
- HSR is affected by topography of the terrain as crossing mountain ranges or large bodies of water requires expensive tunnels and bridges.
- HSR is costly due to required specialised infrastructure as well as advanced technologies and multiple safety systems.[citation needed]
- The infrastructure is fixed hence the services provided are limited and can not be changed in response to changing market conditions. However, for passengers this can present an advantage as services are less likely to be withdrawn from railways compared to flight routes.
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