If you are operating a commercial semi-truck, then you need truck insurance which can be provided by insurance companies such as progressive. Progressive has insurance for all types of trucks and has many coverage options.
It means Special Trailer Service. It is not to be used on motor vehicles. It is for boat, utilily, or trailers.
It would depend on the size of the truck. In most cases you would not.
First, training must be obtained. There are trucking schools and tow-truck training schools listed on the web. Then, a special license must be obtained to operate a tow truck.
A Class B license would be all you need to drive a garbage truck. This is a special class license used to operate certain vihicles such as the garbage truck.
To drive a dump truck the type of insurance you're going to need is commercial truck insurance. But you're also going to need a special license to drive a dump truck as well. Call your insurance provider and they can probably give you more information.
We are to guess at the dimensions of said trailers -
There are surely requirements on how to attach bike trailers to a truck. However, these requirements vary state to state, and truck to truck. You should check with your local Motor Vehicle Department.
There isn't a certification or a test that you must take to legally operate a bucket truck. However, most states do require that you have the Class C designation on your driver's license.
Sometimes auto dealerships offer used truck trailers. If one cannot be found there, then some trucking companies will sometimes sell their older trailers in order to make room for newer ones.
No special liscense is required to operate a 4 wheel drive vehicle. These are considered private passenger vehciles.
Victoria
"Have to had," is wrong. It changes tense it is also ambiguous.