Furthermore, a truck driver needs to be polite with everyone, including the dispatch department.
Why am I saying this?
For one reason, dispatchers are the ones that are somehow controlling the routes of the truck drivers.
If you did not know, politeness not only describes a significant part of your character but serves as a truck driving strategy as well.
Correspondingly, politeness leads to a possible friendship. Having said this sometimes is not a bad idea to make friends among other employees.
Second, they are your colleagues. Being polite with the colleagues can bring you nothing but progress at your career.
Additionally, you will have no rivals who are constantly trying to prove they are better than you or steal your career.
On the contrary, they will be there for you when you need help with something and more importantly, you can always learn a trick or two from others that you can use in the future.