I don't know why more people don't race, regardless of vehicle. Speeding while commuting is pointless in a car or on a bike, there are no appreciable time savings to be had when anybody else is on the road and/or there are any stops. If you want to drive fast or ride your bike fast, go race somewhere. And wear a helmet. Drive/ride slow everywhere else. Speed kills. I don't believe it's an end-all solution, but man, imagine if everybody just gave themselves 10 or 15 extra contingency minutes for each trip, or how about 15% of travel time in minutes, regardless of vehicle. Even 3 minutes. "I don't have to rush around this cyclist, I left for work 5 minutes early. I can wait 10 seconds". "I don't have to ride my bike 20mph to get to work on time, I gave myself 10 extra minutes so now I can afford to ride 15mph, take a break halfway, and have time for a cup of coffee when I get there. If I flat a tire, I have time to change it and still get to work on time". I don't hear people talk about the "rat race" anymore, but that doesn't mean it's not a real thing.