Illusionary speed bumps
Cool. Of course, people may soon figure out that they're illusory and stop slowing down. That's when you replace them with real speed bumps. MOOHAHAHAHAH!
In which I write down all those musings of which the world has been horribly deprived until this moment. (Progressive Politics, Liberal Religion, Sex, and the occasional abnormality that bubbles forth from goodness knows where.)