“Virtual speed bumps” are being used to trick drivers into slowing down in Philidelphia. The 3-D markings are a fraction of the cost of real speed bumps, which cost $1,500 and up. I can’t help thinking that this situation is a little bit of “phishing” in the real world by trying to fool drivers with optical illusions. As mentioned in the article, the effect wears off over time, and I can imagine all kinds of applications on our roads, schools, and malls.”]
Source: https://www.csoonline.com/article/2135645/watch-out-for-the-virtual-speed-bump.html