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2. Truck classification - Wikipedia

   en.wikipedia.org/wiki/Truck_classification

   The now-imprecise ton rating has continued since the post World War II era to compare standard sizes, rather than actual capacities. [25] [26] In 1975, a change in U.S. emission laws required any vehicle under 6000 pounds GVWR to burn unleaded fuel. U.S. pickup truck manufacturers responded with a "heavy half" pickup of over 6000 pounds GVWR. [23]

3. Vehicle weight - Wikipedia

   en.wikipedia.org/wiki/Vehicle_weight

   A CDL is also required for certain vehicles under 26,000 lb GVWR, such as buses and for-hire passenger vehicles of 16 or more passengers, all vehicles transporting placarded hazardous materials or wastes regardless of weight or load class, and any vehicle towing a trailer with a Gross Trailer Weight over 10,000 lb (4,536 kg) where the combined ...

4. Semi-trailer truck - Wikipedia

   en.wikipedia.org/wiki/Semi-trailer_truck

   Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...

5. Caravan (trailer) - Wikipedia

   en.wikipedia.org/wiki/Caravan_(trailer)

   Fifth wheel camper. A fifth-wheel is a travel trailer supported by a hitch in the centre of the bed of a pickup truck instead of a hitch at the back of a vehicle. The special hitch used for fifth-wheels is a smaller version of the one used on 18-wheeler trucks and can be connected by simply driving (backing) the tow vehicle under the trailer ...

6. Federal Bridge Gross Weight Formula - Wikipedia

   en.wikipedia.org/wiki/Federal_Bridge_Gross...

   Others, such as Massachusetts, impose a less complicated fine schedule whereby a vehicle that violates the limits by less than 10,000 pounds (4,500 kg) is fined $40 per 1,000 pounds (450 kg), while a violation over 10,000 pounds (4,500 kg) pays $80 per 1,000 pounds (450 kg) (e.g. 5,000 pounds or 2,300 kilograms overweight equals a $200 fine).

7. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   Modern fifth wheels allow the trailers to slide into the fifth wheel and lock into it very reliably when maintained and serviced properly. The engagement of the king pin into the fifth-wheel locking mechanism is the only means of connection between tractor and trailer; no other device or safety mechanism is used.

8. Chevrolet Express - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_Express

   An all-wheel drive option was offered for the model years 2003–2014 on 1500 and light-duty 2500 vans (below 8,500 lbs GVWR). AWD vans came exclusively with a 135" wheelbase and GM's 5.3L V8. For 2022, the Express entered its 26th year of production, overtaking the 1971–1996 Chevrolet Van in production longevity.

9. Power-to-weight ratio - Wikipedia

   en.wikipedia.org/wiki/Power-to-weight_ratio

   Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement of actual performance of any engine or power source.