While many people with disabilities can benefit from power wheelchairs, some people with disabilities find it difficult or impossible to use a basic power wheelchair. To serve this group, several researchers have developed "smart wheelchairs" that use technologies originally developed for mobile robots to reduce the physical, perceptual, and cognitive skills needed to operate a motorized wheelchair. Smart Wheelchairs are mechanically controlled devices that can move on their own with the help of a user command. This reduces the user's human effort and force required to push the wheelchair wheels. It also allows visually or physically disabled people to move from one location to another. The wheelchair also has an obstacle detection system, which reduces the likelihood of a collision while traveling.