Very long line of white trucks with flashing lights on roof

Going to the store earlier I had to make a U-Turn so I pulled into the You-Turn lane in the middle of the road. I assumed the motorcycle guy who was in the lane kind of facing me was just distracted because he didn't move.

I honked the horn and then I pulled up and asked him to get out of the way so I could do my U-Turn. His words to me were, "Fuck around and find out"

So I pulled up closer to him and said, "Why do you have to be such an asshole?" He said nothing and I realized I could then just go behind him. But when I did another motorcycle came up to try and block me. I got around him and went down the road.

It was around then that I realized there must have been at least 50 trucks coming from another road and going the same way as I was ....... But they were all on the far right and there are 3 lanes on that side. I stayed on the lane farthest from them

Who are these people????? I spoke to the girl at Dunkin Donuts and she said it sounded like a motorcycle rally.