Instead of using universal joints for steering, I used meshing conical gears that could pivot around each other.These gears are powered by a differential.(See photos for more information.)
The modified type of 4 link suspension works really well on this type of vehicle because it uses modules, not a solid chassis.The main module (chassis) is connected to the two wheel modules by means of u-joints and linkages. At the corners of the main module, springs run down to the wheel modules, completing the suspension. Pictures 3 and 4 show suspension travel.
Here is the program and movie.
I entered this project into the "Human Transport" section of the challenge because this vehicle can improve transportation by COMPLETELY AVOIDING TRAFFIC by driving over rough terrain (such as marshland or the desert), avoiding roads, and thus avoiding traffic.