Watch out for left turners when you're going the same direction and passing one who doesn't use turn signals. Somebody was killed around here recently passing on the highway just as somebody made a left without signalling.

 

Can't let your guards down when you are against a bigger vehicle then you are in, we have more idiots then drivers on our streets and hwys. So many motorcycle crashes happens due to left turn in front of you or vehicle makes left turn without signaling while a motorcyclist try to pass that vehicle.