Don't bother getting into small talk with anyone, they'll use it against you in one way or another.
High stress, in the interview they will ask if you can deal with stress. The stress is not from the job, it is how the management treats you that will bring you stress.
The drivers ARE YOUR BEST FRIEND. Do not ever hesitate to communicate with the drivers.
Slow and easy but without information you become lost. The job will consume your personal life