in Elem Science & Math

Elevated vs. Underground Metro Systems: Which is Better?

1.2k Views

SchoolTube

Elevated vs. Underground Metro Systems: Which is Better?

Have you ever wondered why Chicago is one of the only cities in the world with elevated metro lines running through downtown? Is there a reason why some cities opt for above-ground trains while others prefer underground systems? In this blog post, we will explore the advantages and disadvantages of both elevated and underground metro systems and discuss which one might be the better choice for your city.

Elevated Metro Systems

Elevated metro systems, also known as viaducts, are railways that are constructed above the ground on elevated structures. These systems are often used in urban areas where land is scarce and there is a need to maximize space. Elevated metro systems can also be used to avoid traffic congestion and provide a faster and more efficient mode of transportation.

Advantages of Elevated Metro Systems

  • Cost-effective: Elevated metro systems are generally less expensive to construct than underground systems. This is because they do not require extensive tunneling and excavation, which can be time-consuming and costly.
  • Faster construction: Elevated metro systems can be constructed more quickly than underground systems. This is because they do not require the same level of engineering and planning as underground systems.
  • Less disruption: Elevated metro systems cause less disruption to traffic and pedestrians during construction. This is because they do not require the closure of roads or sidewalks.
  • Better views: Elevated metro systems offer passengers better views of the city. This can be a major advantage for tourists and visitors who want to enjoy the scenery.

Disadvantages of Elevated Metro Systems

  • Noise pollution: Elevated metro systems can generate noise pollution for nearby residents and businesses. This is because the trains are running above ground and the noise can travel more easily.
  • Visual pollution: Elevated metro systems can also create visual pollution. This is because the elevated structures can be unsightly and can block views of the city.
  • Safety concerns: Elevated metro systems can pose safety concerns for pedestrians and motorists. This is because the trains are running above ground and there is a risk of accidents.

Underground Metro Systems

Underground metro systems, also known as subways, are railways that are constructed below the ground. These systems are often used in densely populated urban areas where there is a need to minimize land use and avoid traffic congestion. Underground metro systems can also provide a more comfortable and convenient mode of transportation, as they are not affected by weather conditions.

Advantages of Underground Metro Systems

  • Less noise pollution: Underground metro systems generate less noise pollution than elevated metro systems. This is because the trains are running underground and the noise is muffled.
  • Less visual pollution: Underground metro systems also create less visual pollution than elevated metro systems. This is because the trains are running underground and do not block views of the city.
  • Safer: Underground metro systems are generally safer than elevated metro systems. This is because the trains are running underground and there is less risk of accidents.
  • More comfortable: Underground metro systems can provide a more comfortable mode of transportation than elevated metro systems. This is because they are not affected by weather conditions and can be climate-controlled.

Disadvantages of Underground Metro Systems

  • Expensive to construct: Underground metro systems are generally more expensive to construct than elevated metro systems. This is because they require extensive tunneling and excavation, which can be time-consuming and costly.
  • Longer construction time: Underground metro systems can take longer to construct than elevated metro systems. This is because they require more engineering and planning than elevated systems.
  • More disruptive: Underground metro systems can cause more disruption to traffic and pedestrians during construction. This is because they require the closure of roads and sidewalks.

Which is Better?

The decision of whether to build an elevated or underground metro system depends on a number of factors, including the city's budget, geography, and population density. Elevated metro systems are generally less expensive to construct and can be built more quickly, but they can also generate noise and visual pollution and pose safety concerns. Underground metro systems are more expensive to construct and take longer to build, but they generate less noise and visual pollution and are generally safer. Ultimately, the best choice for a city will depend on its specific needs and circumstances.

Here is a table summarizing the key differences between elevated and underground metro systems:

Feature Elevated Metro Systems Underground Metro Systems
Cost of construction Less expensive More expensive
Construction time Faster Longer
Disruption during construction Less disruptive More disruptive
Noise pollution More noise pollution Less noise pollution
Visual pollution More visual pollution Less visual pollution
Safety Less safe Safer
Comfort Less comfortable More comfortable

Here is a graph showing the relative cost-effectiveness of elevated and underground metro systems:

[Image of a graph showing the relative cost-effectiveness of elevated and underground metro systems]

As you can see, elevated metro systems are generally less expensive to construct than underground metro systems. However, the cost of construction can vary depending on a number of factors, such as the city's geography and the type of metro system that is being built.

Here is a chart showing the relative construction times of elevated and underground metro systems:

[Image of a chart showing the relative construction times of elevated and underground metro systems]

As you can see, elevated metro systems can be constructed more quickly than underground metro systems. However, the construction time can vary depending on a number of factors, such as the city's geography and the type of metro system that is being built.

Conclusion

The decision of whether to build an elevated or underground metro system is a complex one that depends on a number of factors. There are advantages and disadvantages to both types of systems, and the best choice for a city will depend on its specific needs and circumstances.

Here are some additional resources that you may find helpful: