What function does an electronic travel aid serve?

An electronic travel aid is designed to supplement traditional mobility aids, rather than completely replace them. These devices enhance the user's ability to navigate their environment by providing additional sensory information through various technologies such as sonar, laser, or GPS. For individuals who are visually impaired, electronic travel aids work alongside long canes or guide dogs, helping to identify obstacles and navigate safely. This supplemental approach leverages the strengths of both electronic devices and traditional aids, allowing users to enjoy greater mobility and confidence in their travel experiences.

While some might think that electronic travel aids could replace canes or serve as standalone navigation tools, the best practice encourages using them in conjunction with established aids to maximize safety and effectiveness. Thus, their role is to enhance the overall mobility experience, making option B the most appropriate choice.