Brian, I usually go to TomTom My Drive maps on my laptop. having entered your leaving point and destination TomTom will give you three different routes with one of them highlighted as their preferred one. It allows you to drag and drop to enable you to alter them to your preferred way. You can then send this route to your device which it will follow, or should do?
Even after I've unticked the box which allows TomTom to divert me for example, traffic build up or accidents etc, at times it wants to send me off on some strange ways when I know for sure I'm on the best route.