Originally Posted by dragonbreath

That truck driver should have made sure it was clear before he decided to merge. He also shouldn't have merged over a solid line. Had the OP been passing on the right, the blind spot excuse could have worked, but not on the drivers side. That was negligent driving. Good spider-sense OP. If you always anticipate the worst then you will have a better chance of avoiding accidents.

What kind of camera are you using as a dash cam? That's a good idea.