What is a primary characteristic of travel trailers?

Travel trailers are specifically designed for temporary living accommodations, making this the primary characteristic that distinguishes them from other types of housing. They are typically used for recreational purposes, such as camping or traveling, and can be easily towed by vehicles. This temporary nature allows for flexibility in use, as they can be moved from one location to another depending on the needs of the owner.

In contrast, travel trailers are not built for permanent living; they lack the durability and foundation requirements of stationary homes. They do not have a fixed attachment to a foundation, which is a key characteristic of traditional homes. Additionally, they are not constructed on-site, as they are manufactured in a factory setting and then transported to the desired location for use. This reinforces their role as temporary living solutions rather than permanent residences.