Carnegie Mellon University's National Robotics Engineering Center created this unmanned 'crusher' all-terrain-vehicle for the Army:
Since Crusher and its predecessor do not have to accommodate human crews, their novel designs offer unequaled ruggedness, mobility and payload-carrying capacity compared to manned vehicles in their weight class. Crusher's hull is made from high-strength aluminum tubes and titanium nodes protected by a steel skid plate that can absorb shocks from impacts with rocks or tree stumps. Its unique suspension enables it to move smoothly over extremely rough terrain and overcome obstacles like large ditches, man-made barriers or piles of boulders. It can carry more than 8,000 lbs. of payload and armor. Electric motors embedded in each of the vehicle's six wheels are powered with a hybrid system that uses a turbo diesel generator to recharge its batteries. Its top speed is currently 26 miles per hour.