It most certainly is low skilled. Anyone can sign up, take a 2 week course given by the municipal public transit system, then take the state's Class B license test. After that, you are in charge of the "twenty tons of steel" no holds barred.
In fact, at the local university (it's a UC, but I won't name it since then you'd know which municipal public transit system I'm using in my anecdotes), student's 21 and up can apply and take a 1 week course, the UC pays for the Class B license test, and then they, a student, gets to drive the UC's "twenty tons of steel" buses around campus and to nearby neighborhoods shuttling students around. (ya, it's as scary as it sounds). I don't know for sure, but I assume more UC's have similar programs.
"Low skilled" is, in this case, in comparison to the population, not some objective absolute. In CA, "driving literacy", which is almost sufficient for piloting said steel contraption, is comparable to real literacy, and I suspect is way above numeracy. Would you consider being able to read or do arithmetics anything other than "low skilled"?
