The main disadvantage of high-?speed trains, other than their slow speeds compared with air travel, is that they require a huge amount of infrastructure that must be built and maintained to extremely precise standards.
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Dedicated Infrastructure Is WastedBut 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.
Abstract. In this chapter, we review the level of disturbance caused by railways due to noise and vibration, air, soil and water pollution, and soil erosion.
Disadvantages of electric traction include: high capital costs that may be uneconomic on lightly trafficked routes, a relative lack of flexibility (since electric trains need third rails or overhead wires), and a vulnerability to power interruptions.
Implementing high-speed rail will keep billions of dollars in the U.S. economy by decreasing the amount of oil that the U.S. consumes. According to the International Association of Railways (UIC), high-speed rail is eight times more energy efficient than airplanes and four times more efficient than automobile use.
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.
According to EPA data, freight railroads account for just 0.5% of total U.S. GHG emissions and just 1.7% of transportation-related GHG emissions. Moving freight by rail instead of truck lowers GHG emissions by up to 75%, on average.
One of the biggest environmental benefits of trains is that they consume far less energy than other types of transport. It takes a huge amount of fuel to get a plane carrying hundreds of people airborne, whereas trains are streamlined, require much less energy to move, and are increasingly able to run on electricity.