A campaign in Austin, Texas, wants to replace aggression on the road with a friendly wave. Car drivers are from Mars and cyclists are from Venus, and sometimes they fail to communicate. Instead of appreciating of each other's rights, both groups have a tendency to get nasty on the road, which benefits no one. In the long term, the answer is probably full separation, with cyclists given their own infrastructure. But in the short term, we have to just get along better. To that end, a new shared streets campaign in Austin, Texas, has a simple solution: waving. "There's infrastructure stuff happening and there are laws passing. But meantime if everyone has a horrible attitude, it's still going to be adversarial," says Adam Butler , creator of the Wave campaign . "What's the software of all that stuff? It's the attitude of people, which doesn't cost anything." The campaign is so simple it sounds trite. It encour