A prat nav is an aid for you driver not the bible, by a bridge heights map,and some good ol fashioned AtoZ,. Councils put up and take down signs like there going out of fashion,also what would you do if the road the prat nav says to take is closed,or just unsuitable,..
Just buy a normal sat nav and some maps.
ah I see you only drive from home to the hospital.
when you in a strange place and don't know where you going then having to turn round because a bridge is to low just wastes time and fuel,also finding somewhere to park to look at your map then rember the route is not very practical [also carrying all the maps for the uk costs more than a sat nav and is just as likely to be out of date]as driving while trying to look at a map is not a good idea.of course if the road is closed the sat nav will also find a route round.yes a sat nav isn't perfect but as long as you keep your wits about you its a good drivers aid.
been to many a strange place in England and Europe,,how did we manage before prat navs.(thinks),
yes they are a usfull aid when driving thro a large city,or finding a drop so you can concentrate on the road, i have seen many people, car and trucks in some strange places. And yes I've done it, middle of the picardy region in France, and parts of welsh wales. But with luck and swearing,got out of the situation, worst was going down a 7.5ton limit in Manchester,and finding no room to get 44tons turned,time to reverse blind back the way it came,
it was a new weight and width limit,