You will end up revising it because drivers have a nack of finding ways to screw things up, steal, break things, not do paperwork, quit on you with no notice etc.
Things to include:
Pay structure
Truck maintenance
Who's responsible for damages and deductibles
Paperwork policy including logs, trip sheets, ifta and how frequently they turn it in
Two week notice if they quit clause or poss face a penalty
How often they should be in service
Fuel card policy, cash advance policy
Accepting and refusing loads..I like to define that
possible fine structure for not following procedures in contract
That shoulod be a good start, just be very discriptive and defeine everything, make them sign it and give them a copy so they know what you expect.