Signal® Mirrors help in all these situations.  By bringing your turn signals up to the level of your mirrors, you ensure that drivers riding too close to your rear wheel can still see your signaling intentions.  The high-intensity LEDs in the Signal® Mirrors are aimed to provide the highest intensity light slightly outward, so that drivers in your "blind spot" will get the brightest light.  The LEDs are visible from your perspective in the rider's seat, but at a reduced brightness - enough to remind you if you forget to cancel your signals, but not bright enough to cause problems seeing in the mirrors at night when the signals are on.