One of the biggest challenges drivers face, especially in rural areas that they don't know well, is knowing what speed they should be doing as they approach towns and villages. Many modern cars have ADAS (Advanced Driver Assistance Systems) - the little road sign which tells you the current speed limit, but they are not always accurate. Get it wrong, and you could receive a fine or, worse, cause an accident. Nothing can make up for that local road knowledge, this is where SID
