I drive a 40-ton diesel truck. I don't swerve for anything. If I swerve to avoid hitting something or someone, I'll likely hit someone else - or roll the truck - or lose the load I'm carrying. (I mostly carry precast concrete. There's nothing like dropping a 26,000 pound block of concrete on somebody's car!)
I brake as hard as I safely can, hit the horns and keep the truck in the lane I'm in. I figure the trucks front bumper will move whatever's in the way (and, sadly, won't leave a whole lot left of it). Unfortunate, but I figure that truck isn't going to hit you unless you're dumb enough to get in front of it - and yet people still do! I'm in a vehicle that takes around a 1/4 mile to slow to a stop, yet almost ever car that passes me immediately gets directly in front of me. Scary! Sometimes I think I'm surrounded by future Darwin Award winners!