- There are a lot more cars and trucks than motorcycles on the road, and some drivers don't "recognize" a motorcycle; they ignore it (usually unintentionally). Look for motorcycles, especially when checking traffic at an intersection.
- Because of its small size, a motorcycle may look farther away than it is. It may also be difficult to judge a motorcycle’s speed. When checking traffic to turn at an intersection or into (or out of) a driveway, predict a motorcycle is closer than it looks.
- Because of its small size, a motorcycle can be easily hidden in a car’s blind spots (door/roof pillars) or masked by objects or backgrounds outside a car (bushes, fences, bridges, etc). Take an extra moment to thoroughly check traffic, whether you're changing lanes or turning at intersections.
- Because of its small size a motorcycle may seem to be moving faster than it really is. Don't assume all motorcyclists are speed demons.
- Motorcyclists often slow by downshifting or merely rolling off the throttle, thus not activating the brake light. Allow more following distance, say 3 or 4 seconds. At intersections, predict a motorcyclist may slow down without visual warning.
- Turn signals on a motorcycle usually are not self-canceling, thus some riders, (especially beginners) sometimes forget to turn them off after a turn or lane change. Make sure a motorcycle's signal is for real.
- Motorcyclists often adjust position within a lane to be seen more easily and to minimize the effects of road debris, passing vehicles, and wind. Understand that motorcyclists adjust lane position for a purpose, not to be reckless or show off or to allow you to share the lane with them.
- Maneuverability is one of a motorcycle's better characteristics, especially at slower speeds and with good road conditions, but don't expect a motorcyclist to always be able to dodge out of the way.
- Stopping distance for motorcycles is nearly the same as for cars, but slippery pavement makes stopping quickly difficult. Allow more following distance behind a motorcycle because it can't always stop "on a dime."
- When a motorcycle is in motion, don't think of it as motorcycle; think of it as a person.
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Source: Motorcycle Safety Foundation