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    First, car makers wanted to take the human out of driving. Now, motorcycle manufacturers (制造商) want to do the same. But just as the driverless car movement has faced skepticism, it's not entirely clear that the world needs autonomous motorcycles.

    What would a self-driving motorcycle do? It would be designed to let the rider sit back and relax while the machine drives by itself. Manufacturers have actually been creating and improving prototypes (原型) of self-driving motorcycles for years, and they're only just now beginning to share them with the public. For instance, AB Dynamics and AutoRD released the Autonomous BMW Cl. It comes with autonomous software, GPS, and re-balancing technology.

    Yamaha's Motoroid is a model that uses artificial intelligence and self-balancing technology. The Motoroid sounds very futuristic, but it can't drive on its own. It needs a rider to make turns. Another example of an autonomous-light motorcycle is Honda's Riding Assist-e, which can change the center of gravity autonomously. However, like the Motoroid, it's not completely self-riding and isn't ready for a highway on its own.

    Safety concerns for autonomous motorcycles are similar to those that trouble self-driving cars Firstly, the autonomous system may make a mistake and endanger the rider. Self-driving cars have an unfortunate record of running red lights and causing accidents. Professor Adam says, "So one can be forgiven for worrying about the safety of a two-wheeled speed machine with no one behind the handlebars." Secondly, there's the question of responsibility: Who is at fault if a self-driving bike crashes into another car? More importantly, it's not easy to satisfy the official regulations before autonomous motorcycles ride on the road. And to develop the industry will cost billions of dollars.

    But there's the biggest problem with all of these motorcycles. One of the joys of driving motorcycles is the driving. It seems unlikely that a rider, like a high-speed motorcycle collector who loves the thrill of turning around corners, will give up the experience of the ride.

    The prototypes for self-riding motorcycles are here, and manufacturers are busy putting them to the test, but it might be a while before we see them on the open road.

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