So, driving back from a long weekend away in the hills this evening and after nearly 7 hours in the car (yes, via Birmingham) it occurred to me that my in-car GPS needs a new filter. It can already steer me via the shortest route, or only on motorways, or always away from motorways. But what I really need is a filter that avoids “insalubrious areas”. I thought I’d been around London and seen most of it, but with the top down, late at night, there are definitely some parts you don’t want to be in. I figure a voice that yells “You don’t wanna take that turn in this car” at appropriate moments would be helpful.