Navigating in street is simplified as GPS devices are being used nowadays. But a lack of proper street names in city areas can also lead to dangerous, unintentional behavior in busy streets. This is an issue which should be overcome with with standards developed for the placing of road signs with topology taken into account as all street vary with types of visibility problems. Otherwsie this reveiw on road safety has some plusses, but failt to mention if we drive a 5 mph we ca nstill kill someone. Me I'm staying at home when that idea hits the road safety people.