Depending on contract language. Here in the southern region you will start at 70% of top pay rate till you make seniority, then you will go to 75% for the rest of the year, in the second year will go to 80%, in the third yr would be 90% till you finally reach top pay. health, vision, and dental insurance after 90 days. Expect to work nights for 10-15 yrs. Commercial drivers license is required to work on tractor units due to need the ability to drive off property if needed. Here in Texas a State Inspector license is required.
Now on to the other part of your question. be prepared for some of the dumbest decisions to be made from mngt, just remember to work as directed no matter how dumb, unless the safety of the public comes into question. If you feel the vehicle is not safe for the public roads. Red tag it for safety, the safety card trumps mngt card every time. Remember mngt will not be the one going to jail for YOU putting a unsafe vehicle on the road.