Bonomo,

Thanks for a great question.

*Aggressive driving* and *dangerous driving* are usually considered to mean the same thing.  If someone drives aggressively, it means that they drive in a reckless manner, such as speeding, tail-gating, excessively changing lanes, or improperly passing.

*Dangerous driving* basically means the same thing, although this term seems to be more common in British English than American English, especially as a legal term.

So, I agree with you. They basically mean the same thing.

I hope this helps.