Escalators are unique machines as they are in constant use but are rarely under supervision. Courts have considered under what circumstances manufacturers, installers, owners, or maintainers of escalators can be liable for injuries resulting from an escalator.
In the United States, a common carrier is a person or other commercial enterprise that transports passengers for a fee and establishes that their service is open to the general public. Some common examples of a common carrier are railroads, airlines, and taxi services. Common carriers are held to a slightly higher standard of care than individuals, they are required to provide their passengers with the utmost duty of care. For example, common carriers are liable for injuries suffered by passengers as a result of a carrier’s negligence but do not ensure passenger safety. Companies and drivers are not responsible for injuries that happen because of causes that are out of their control.