Elvis, made by Help Mate Robotics looks like a refrigerator on wheels and has been commercially available since 1991. It delivers medicine, food and medical records. Blinky is a mail-delivering robot in Washington's Department of the Interior building. It is programmed to follow a particular course and stop outside office doors. Because Blinky does not have arms, people must actually remove their mail from slots on Blinky's sides.
Autonomous road following is one of the more dramatic demonstrations of vehicle autonomy.
Autonomous visual steering was used for 98.2 percent of the trip at speeds averaging 57 miles per hour. Just as there are unmanned land vehicles there are unmannned aerial vehicles. These results have been most impressive in all respects. Their system has also been able to perform lane changes and navigate highway entrance ramps safely. The key limitation of planning systems is the the high level of computational resources required to solve complex problems.