According to an ex-coworker who is certified as a truck driver (but did not go that route professionally), truck drivers are among the best and most careful drivers out there because of the rigorous training and requirements to still be employed. Well, last week a semi started to merge into my lane when I was directly next to the middle of it. My knee-jerk reaction was to swerve into the next available lane, and thankfully no one was on that side of me. The semi never stopped his merging or even delayed it. It's like he was 100% unaware I was even there.