My dad was a truck driver back in the day.
Well thank him for his service! Truck drivers are essential to our society, as raw materials need to be moved in great quantity.
I will tell him! I didn't know truck drivers were so important!
Trucks in general don't get enough love.  The majority of manufacturing goods is done by truck.
That is so interesting! I wonder how many people drive trucks for a living.
That's tough to say, seeing as how anyone who earns a living as a driver, semi, box, or dump, could call themseves a truck driver.
That
applies to off-road construction plant only, and the road vehicle is known as a tipper lorry (UK, India), tip-truck, tip-trailer, tipper truck, or tipper (Australia and New Zealand).
History.
The dump truck is thought to have been first conceived in the farms of late 19th century western Europe. Thornycroft developed a steam dust-cart in 1896 with a tipper mechanism. The first motorized dump trucks in the United States were developed by small equipment companies such as
are set using a Johnson bar as referenced in Fred Eaglesmith's "Back There": "Hey Porter, tell that engineer, tell him this train's too slow. Tell him to let go that Johnson bar. I got places I got to go."
Many trucks and buses use a hand brake which is controlled with a Johnson bar. These are sometimes called "Johnson bar brakes".
Truck drivers call the lever control for air-operated trailer brakes "Johnson bars".
On Caterpillar tractors