Hi,
What you are essentially wanting to form is a "virtual trucking company". They come in all sorts of variations, either by purpose or size.
Either way, this is a fantastic service that I would recommend checking out to allow you to form your own virtual company - tracking your employees mileage, deliveries made and money earned and a lot more additional features.
I have used this in the past; alongside many other VTC owners I have had contact with: http://virtualtruckingmanager.com/ (VTM Live)
All instructions + additional support is available on the website above.
Best of luck and be sure to let us know of any further queries you may have.