The two images above show the extended state of the side and rear bumpers. The side bumpers will have to be designed such that they do not interfere with the opening of the car doors. The images show how wide fenders and running boards can be incorporated into the design.
The wide fenders and running boards allow the side bumpers to be extended without the bumpers extending beyond the actual body of the vehicle.
If running boards are present, there is no need to retract the side bumpers.
The yellow vertical posts are optional. The posts protect against impacts from vehicles with high front bumpers.