What US States allow triple tractor trailers?

As of now, several U.S. states allow triple tractor trailers, commonly referred to as "turnpike doubles" or "triples." These states include Alaska, Arizona, Idaho, Montana, Nevada, Oregon, South Dakota, Texas, Utah, and Washington. However, regulations can vary significantly, including restrictions on specific routes and weight limits, so it's important for operators to check local laws before traveling. Always refer to the latest state regulations for the most accurate and current information.