When it's on paper, it's very clear that the information is not live updated. Also, that piece of paper wouldn't be giving instructions. The level of alertness

When it's on paper, it's very clear that the information is not live updated. Also, that piece of paper wouldn't be giving instructions. The level of alertness and the expectations would be calibrated accordingly. In the case of Google Maps, the thing claims live data and gives you authoritative instructions like "turn left". People have tendency to follow instructions and trust the computer, so if the computer says something people try their best to do it. Combine that with the illusion of live data, there you have a disaster waiting to happen. After all, the device that knows how much traffic is there at this very moment at particular location must also know if there's a bridge or not, right?