I figured I'd post this up after some twit on a CBR1100 almost turned himself into a red splotch on the side of my work truck....
We've all heard about people not seeing bikes, and while a lot of the time it's purely a result of not paying attention, sometimes people just don't see you.
Large commercial vehicles such as semis and cube vans have huge blind spots; it is entirely possible for a extended cab F350 dually to dissappear in the blind spots of the truck I drive at work. It is even easier for a motorcycle to do so.
Remember when you're passing large vehicles that if you come up behind them they can not see you. Do not wait until the last minute to change lanes, as you are essentially moving from blind spot to blind spot. Unless the driver happens to catch you in the mirror as you are changing lanes, they may never know you are there.
Change lanes into the lane beside the vehicle as soon as you decide to pass the truck, and move to the middle or outside edge of the lane. If you are on an almost empty highway and see a large vehicle about to go up a hill, realize it will likely lose a lot of speed going up the hill, and move to the left lane immediately so that you will be visible when the driver checks his or her mirrors. You will also have more time to respond to any actions the other vehicle takes, and are more likely to be noticed. When you are passing the vehicle it is beneficial for both people for the person passing to be decisive. The more time you spend beside the truck, the more time you spend invisible to the driver. The more time you spend there the more dangerous it is to you and the more disconcerting it is to the driver who is now wondering where the hell you are.
Do not (at least if you value your safety) come up behind a semi doing 40 over the limit and swerve to the other lane when you are 20-30 feet behind the large vehicle, you will be invisible to the vehicle until you are almost finish passing it, and they will not be expecting someone to do 110 in a 70 zone. This is especially important if the driver has shown any intention to change lanes. No driver is going be looking at their mirror for the duration of a lane change when they are driving in traffic in a large vehicle.
Yes, I realize that it is the other driver's responsibility to ensure the lane is clear before switching into. The fact of the matter is that blind spots exist and, whether ICBC says you are right or wrong, getting run over by a semi or a cube van will still suck.