Alternate Solution #2

Alternate solution 2

Solution 2: 

          This solution will be using tires instead of treads.  Instead of the two motors like on the tread alternate solution, this will have one motor that connects to an axle, which will power the two back wheels.  Also there will have to be a steering mechanism where there will have to be another motor that will turn the front wheels left and right.  

          The steering mechanism will be using a servo motor that moves a threaded bar left to right which also moves the wheels left to right.  This is much like the steering system on a car.