advantages and disadvantages of under ground metro
Answers
Advantages:
1. Cost effective : A train is the best way to haul lot of people for a relatively low price.
2. Low maintenance: Compared to bus and road motors, a train needs less maintenance and has higher availability.
3. Low infrastructure cost. Its cheaper to build tracks than lay a highway.
Disadvantages:
1. Fixed routes : You cant put a train on most of the cities older interior roads. Grading requirements also limit the places where you can take a train tracks.
2. Underground tunnels are the most expensive to build, operate and maintain. Some zones will require underground tunneling as is the case in central Bengaluru.
3. Coverage of every point in city is not possible unless the city was planned for a subway. If you are adding metro to existing city, you will many older zones cut off.