Unable to stop ranting...

Sometimes my Mother gets seriously brassed off because I can't stop ranting at other drivers poor driving skills like drivers pulling out without indicating and then continue fail to indicate when turning left.

This is just one type of incident, the fact remains, I can't help but having to "explode" and I've been like this all my life and I was only diagnosed as autistic 3 months ago and I am 51 years old.

Is this genuinely an autistic trait or am I just an aggressive person because it's my default setting since childhood?