I had a bit of an epiphany while driving home from a club ride yesterrday. I was on a fairly busy road at about 40mph following a motorcyle and a line of cars in front of him. As traffic slowed I found myself too close to the bike and realised that unconsiously I was basing my distance off the car in front of him. He was on a dark bike with nondiscript clothing and unless I consiously focused on him he was almost "invisible" to me.
If this happens to a motorcycle, what do I look like on a bicycle to other drivers in traffic! Although I always commute with 2 blinking rear lights, 2 blinking front (in daylight) and wear really bright clothing, I finally saw why this is so important.
I guess what I am trying to say is, do whatever it takes to make yourself as visible as possible, looking like a clown may save your life.