Bus Bully

There's a bully on the kids' bus and it's not a child.  Nope, it's the bus driver!  Since the first day of school the children have been complaining about their bus driver.  Keep in mind this is not just my children complaining but every child I know that takes their bus has complaints.  We're not talking about the bus driver just being a little too strict either.  The complaints range from making the 5th graders sit up at the front of the bus (which is a big deal because these kids have waited six years to get to sit in the back of the bus) to the bus driver pushing the kids down into the seat she wants them to sit in, to the bus driver pressing on the brakes hard and causing the kids' heads to go into the seat in front of them and so much in between.  What has been done about this you ask?  Well, many parents have complained to the bus transportation department and to the school's principal to no avail.  The principal has been in talks with the transportation department but they're just not doing anything to rectify the situation.  On one particular situation the bus driver was apparently talked to by her superior because she told the children on the bus, "I know who told my boss on me".  Now the children fear their bus driver.  The big problem I see with this (other than the obvious) is what happens if an adult does something more severe to one of these children and they're too afraid to say something because of their experience with this bus driver?  I'm not sure what the next step is; a petition perhaps, or contact the newspaper?  Something must be done.