Question

3. The network of underground trains in London
Chugging Along​

Answer 1

This article is primarily concerned with accidents on the London Underground network, which carries around a billion passengers a year. Statistically, there is just one fatal accident for every 300 million journeys.[1][2] There are several safety warnings given to passengers, such as the traditional 'mind the gap' announcement and the regular announcements for passengers to keep behind the yellow line. Relatively few accidents are caused by overcrowding on the platforms, and staff monitor platforms and passageways at busy times preventing people entering the system if they become overcrowded.

Answer 2

Answer:

The London underground (also know as the tube or simply as the underground)

Explanation:

Total line are 11

Began operation on 10 January 1863