it's not a question of if they will see you, it's WHEN they will see you. using hi-vis day-glo lime-green tops and very bright front and rear strobes will allow cagers to see you from a distance and plan their routes around you. when you ride in the dark you will need to add reflective tape, quite a lot, all around even on your clothing because no color is visible with the lack of light. hi-viz stuff disappears in darkness.
interesting web site
http://www.bikecommuters.com/2010/10...ebs-creations/