I had the same thing the other day. I was driving a route I'd not been down for a while so just needed something as a double check. It was trying to take me all over the place in the most odd directions!
I use waze (if using my mobile phone) for directions.
Lets you know where the traffic is and even when there are broken down cars on hard shoulders etc.
It`s free and easy to use.
Another addition is that you can track a friend or relative that is heading to the same destination as you.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.