Tunnels and trains 1

1. What are the concerns of project manager Bryan Lee?
if the building meterail matched what they wore going to use in the agreement.

2. Why do they engineers and construction workers use a boring machine to make tunnels instead of cut and cover construction? because the boring well make the tunnels more stable.


3. What do the worker’s do to protect themselves in the newly formed tunnels from harmful levels of gases found in the soil at the various new subway sites?
they wear protective gear.