Reading Gestures

I realise not understanding unspoken rules is a big tell but does anyone else have real trouble with body language even when it's being explicit?

In particularly I'm thinking in the car when someone is manually directing traffic for whatever reason. I have real, real difficult in understanding what their weird array of hand gestures and facial contortions actually mean. I've nearly ran over one on more than one occasion. Nearly had car accidents. I understand a flat palm upwards means stop but after that, no clue.  My wife has to translate for me what they're telling me to do.

Is this autism or just me? :)