It is assigned by the manufacturer. You can find the GVWR on the VIN plate on the door or door frame of most power vehicles, and on the VIN plate on most trailers. If you add the GVWR from the Truck and trailer and it is more than 10,000 pounds, it's a commercial vehicle. For example, a Ford F150 has a GVWR around 7000 pounds by itself. A tandem axle flat bed trailer usually has a GVWR of 7000 pounds.
NJ Transit trains travel at different speeds depending on the line, express or non-express, and weather conditions. ! The NJ Transit train travels over 90 miles an hour. Just like the speed of lightening !
How fast can a TGV go? Typically, top speed in commercial service is 300 km/h (186 mph). Under special test conditions a TGV trainset has reached 515.3 km/h (320 mph). Some speed restrictions due to the line or the train may exist, but weather (such as dense fog) does not limit speeds.