What are the environmental issues with high-speed rail?

Building high-speed rail systems require steel and concrete, the manufacturing of which typically generates greenhouse gases. Trucks, bulldozers, and other construction site equipment also consume energy. Thus, during their long construction phases, high-speed rail projects add greenhouse gases.



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High-Speed Trains Provide Environmental, Social Benefits, Study Says. Bullet trains fuel real-estate booms, improve quality of life, reduce air pollution and traffic congestion, and provide a “safety valve” for crowded cities, especially in the developing world, according to a study by Chinese and U.S. economists.

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46.0 g CO2 / pkm The analysis concludes that the carbon footprint of high speed rail including operation, track construction and rolling stock construction is about 14 to 16 times less than transport by private car or airplane.

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Thus, during their long construction phases, high-speed rail projects add greenhouse gases. Adding lanes to existing highways also generates greenhouse gases, but to the extent that recycled asphalt is used for road paving climate impacts can be somewhat reduced.

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Eurostar estimates that a one-way train trip emits around 10 pounds (4.5 kilograms) of CO2 per passenger, making it a much more sustainable choice compared to flying.

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HSR reduces traffic congestion and gaseous waste emissions, as well as environmental pollution, by replacing traditional transportation (Anderson, 2014). According to the study of Chen et al. (2016), HSR has a significant and positive effect on environmental degradation.

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Most CO2 emissions from high-speed rail are a result of deforestation related to the construction of new railway lines.

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High-Speed Rail is the Solution. Shifting drivers to trains creates fewer greenhouse gas emissions, since trains are far more energy efficient than cars (or planes).

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Dedicated Infrastructure Is Wasted But high-speed rail lines can only move people, making them far less cost-effective. To save energy, high-speed rail cars are far lighter than conventional rail cars and cannot be safely used on the same tracks as frequent heavy freight trains.

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“When you take into account the production of railroad equipment and tracks, all of that is very carbon intensive as well,” says Hamilton. “Take the entire picture and trains are actually more polluting than the road buses, even though buses all run with dirty diesel fuel.”

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High speed trains run on electricity instead of diesel fuel. Because much of the world's electricity is still generated at fossil fuel burning power plants, high speed trains do contribute to carbon emissions, however the climate impact of one train is significantly less than that of many personal vehicles.

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This high speed train could be the first to be powered entirely by renewable energy. California's long-awaited high speed train will be solar powered, according to the California High-Speed Rail Authority. It's been a rocky road so far for the California High-Speed Rail Authority's promising new project.

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If you can't walk or cycle, then public transport is usually your best option. Trains are particularly low-carbon ways to travel. Taking a train instead of a car for medium-length distances would cut your emissions by around 80%. Using a train instead of a domestic flight would reduce your emissions by around 86%.

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Heavy metals are the main types of environmental footprints in bridges, stations, and electric systems. Water pollutants are the main environmental impacts for rail and EMU systems, and the emissions of air pollutants are significant in subgrades.

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Finally, the plane is the most polluting means of transport and the one that generates the most greenhouse emissions.

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