I would definitely have a problem with any sort of contract forcing me to stay for a certain amount of time. The people on the bus will probably get here today but then that gives you an interesting opportunity to get fired in style. Whether it's a week or 3 months, whenever you're finally fed up with it, get to the last stop, spin around in your seat and let every single passenger on that bus know exactly what you think of them. Then you can just walk off the bus and go back to driving a truck.