Do you have anyone in your family that is a truck driver, they earn a living by driving a semi truck
I actually don't, but I have a friend that does! It's a tough job. The hours are really long and driving the truck is a lot more exhausting than it looks.
Although they do provide an essential service by transporting goods and raw materials over land - 
They do. It's a very important job! Don't you need a special license to do it?
In the US, I believe they need a CDL License - and part of that is that they are responsible for inspecting their vehicle for issues related to safe operation.
Ahh makes sense. Safety is very important. I would think they needed specialized training too, parking a semi truck can't be easy!
Yes, driving commercial vehicles definitely requires advanced skills and knowledge above and beyond those required to drive a car.
Do you know how much they get paid on average? Special skills must mean decent pay...
and truck and trailer combinations with gross vehicle mass greater than 12 tonnes must rest for 15 minutes every 5.5 hours, 30 minutes every 8 hours and 60 minutes every 11 hours (includes driving and non-driving duties). In any 7 day period, a driver must spend 24 hours away from his/her vehicle. Truck drivers must complete a logbook documenting hours and kilometres spent driving.
Hours regulations Canada.
In Canada, driver hours of service regulations are enforced for any driver who operates a "truck, tractor
capture that 'tanker-truck' feeling, the sense of a big machine grinding unstoppably through town" and further stated: "I thought I should be driving a very, very big truck to try to wake this person who's asleep, so I get the biggest truck in the world, and I'm so mad I've got metallic teeth, because when you're really angry, you grind your teeth. So I have to go to the dentist, who tries to steal away from me a diamond I do