What are the advantages of a subway compared to a bus?

Advantages:

1. Saving land: Since land in the urban areas of metropolitan cities is very expensive, building the railroad underground can save the ground space, so that the ground can be used for other purposes.

2. Noise Reduction: The railroad is built underground, which can reduce the noise on the ground.

3. Reduced interference: Since the routes of the MTR do not overlap or cross with other transportation systems (such as surface roads), there is less traffic interference, which saves a lot of commuting time.

4, saving energy: in the global warming problem, the subway is the best mass transit transportation means. Due to the stable speed of the subway, it saves a lot of commuting time, which makes the public happy to ride, and it also replaces a lot of the energy consumed by driving.

5, reduce pollution: the general car use gasoline or oil as energy, while the subway uses electricity, no exhaust emissions, will not pollute the environment.

Other advantages:

Compared with other means of transportation in the city, the subway has a lot of advantages in addition to avoiding congestion on the city ground and making full use of space.

1. Large transportation capacity. The transportation capacity of the subway is 7 to 10 times larger than the ground public **** car, is not comparable to any urban transportation.

2. Punctuality, punctuality is generally higher than public transportation.

3. Fast speed, subway trains in the underground tunnels, traveling the highest speed generally 80 kilometers per hour, can be more than 100 kilometers and even some reached 120 kilometers.

Disadvantages:

1, the construction cost is high: the subway project route is long, wide range of influence, usually need to route along the buildings, pipelines, roads for demolition, reconstruction, protection and other measures, outside the project cost is relatively large. The subway project is mostly underground, and because of the need to drill and dig underground, the cost of underground construction is higher than that of building on the ground.

2, a long time in the early stage: the construction of the subway in the early stage of a long time, due to the need for planning and government approvals, and even need to test. From the beginning of the conception to put into action groundbreaking takes a very long time, as short as a few years, as long as ten years is also possible.

3, part of the disaster resistance is weak: Although the subway for snow and hail resistance is strong. But on the earthquake, flood, fire and terrorism and other resistance is very weak. Due to the construction of the subway, which leads to a high risk of tragedy because of these factors. For this reason, since the advent of the subway, engineers have continued to study how to improve the safety of the subway.