The following questions are posed and answered by a locomotive engineer (train driver) :

1. How did you learn to be a train driver?

2. What is the best thing about your job?

3. Who keeps the track safe?

4. Who checks the train is safe?

5. Does the snow affect the train?

6. Could you explain the difference between a viaduct and a bridge?

7. How many deaths were there while the Otira tunnel was under construction? The cause of most deaths?

8. What is the steepest gradient within the Otira tunnel and the highest point?

9. Using today's technology, how much quicker do you think the Otira tunnel might have been completed in?

10. Have any earthquakes damaged the internal structure of the Otira tunnel?

More at https://www.learnz.org.nz/stemrail213/connect-with-experts