I was at this intersection. I was the silver rectangle and a truck was the red rectangle. Our lights went green and I turned left into the nearest lane while the truck turned right into his farthest lane. I stopped he beeped and then he gestured out the window at me at the next light.

I feel like truck guy should have turned into the right most lane and then signal to get over. Am I right? Am I right but should have know better than to think truck guy would also do the right thing?