Why do u haul trailers have a 55 mph speed limit

Overview

U-Haul International, founded in 1945 by Leonard Shoen, has grown to become North America's largest do-it-yourself moving and storage company with over 22,000 locations across the United States and Canada. The company's distinctive orange and white trailers have become iconic on American highways, with U-Haul maintaining a fleet of approximately 176,000 trucks and 127,000 trailers as of 2023. The 55 mph speed limit policy for trailers emerged in the 1970s as U-Haul analyzed accident data and recognized that most rental customers lacked professional towing experience. This safety measure was implemented alongside other innovations like the patented 'Saf-T-Liner' hitch system introduced in 1971, which helped reduce trailer sway. The policy reflects U-Haul's commitment to customer safety, with the company reporting that properly loaded trailers towed at or below 55 mph have significantly lower accident rates than those exceeding this speed.

How It Works

The 55 mph limit functions through a combination of design specifications, rental agreements, and customer education. U-Haul trailers are engineered with specific weight distributions, tire ratings, and suspension systems optimized for stability at moderate speeds. When customers rent equipment, they sign agreements explicitly stating the 55 mph maximum speed requirement, with violations potentially voiding insurance coverage. The company's safety literature explains that at speeds above 55 mph, several factors converge to increase danger: trailer sway becomes more pronounced due to wind resistance and road imperfections, braking distances increase dramatically (a fully loaded trailer can double stopping distance), and tire heat buildup accelerates, potentially leading to blowouts. U-Haul recommends maintaining at least 500-1,000 pounds of tongue weight for proper trailer balance and advises against using cruise control while towing, as sudden corrections can exacerbate instability at higher speeds.

Why It Matters

The 55 mph speed limit matters significantly for public safety and liability management. According to National Highway Traffic Safety Administration data, trailer-related accidents cause approximately 50,000 crashes annually in the U.S., with speed being a contributing factor in many cases. For rental companies like U-Haul, which serves over 1.5 million customers monthly during peak moving seasons, maintaining this speed restriction helps reduce accident rates and associated insurance claims. The policy also addresses the reality that most renters have limited towing experience—U-Haul estimates that 60% of their customers are first-time trailer towers. By enforcing this conservative speed limit, U-Haul protects both their customers and other motorists, while also extending the lifespan of their rental fleet through reduced wear and tear at lower operating speeds.