The Americans with Disabilities Act (ADA) sets a number of standards to govern curb ramps and to determine wheelchair accessibility. Curbs create an increased likelihood of injury or accidents for people who use a wheelchair or walker. For a person with a disability, curbs without a ramp could become unusable and be considered discriminatory.

Around the world, cities and countries are working hard to make transportation accessible to the disabled. This is very apparent in South Korea, where a number of steps are being taken to ensure everyone can get where they need to go, no matter their abilities.