I recounted the number of traffic lights I pass through on the way to work. I counted this before, but wasn't sure if I got the numbers right. I did, I pass through 42 lights on the way to work. Interesting tidbit- over half of these lights are in the last three miles as I approach downtown. You can imagine how much of a difference in ride time this would make depending on how many reds and how many greens I hit. I've improved a lot in anticipating the timing of many lights, and adjusted where I sprint and where I cruise in some places. This cut 10 minutes off my ride time. I could work on this more and save even more time, I'm sure, but I am not real motivated, especially since my lungs limit me from sprinting in some areas I see other cyclists take full advantage.