heavytrucks

Heavy trucks are large commercial vehicles used to transport goods and materials on road networks. In the United States, a heavy truck generally has a gross vehicle weight rating over 33,000 pounds (15,000 kilograms). In Europe, heavy goods vehicles are defined as those over 3.5 tonnes. The term encompasses tractor-trailers, rigid (straight) trucks, and many specialized bodies such as dump trucks and tankers.

Common configurations include tractor-trailers that tow a separate trailer, and rigid trucks with a fixed cab and body. Many carry multi-axle configurations to distribute weight and improve stability. Powertrains are typically diesel, with inline-six engines delivering high horsepower and torque, paired with manual, automated manual, or automatic transmissions. Air brake systems are standard on the heaviest models.

Safety and compliance features are widespread, including anti-lock braking systems, electronic stability control, and advanced driver-assistance systems. Modern fleets use telematics and electronic logging to monitor performance and hours of service. Emissions standards, such as EPA limits in the United States or Euro 6 in Europe, influence engine choice. Regular maintenance and driver training are required for safe, legal operation.

Economically, heavy trucks are central to freight networks, construction, mining, and waste management. They affect logistics costs and road wear. Ongoing developments aim for greater fuel efficiency, alternative fuels and powertrains (including hybrids and electrics), and, in some markets, autonomous driving technologies.