Also, if it shows a turn with a road name, and then strait arrows below it means that the name of the road is changing. You don't actually make a turn, the road name just changes. This even happens when the road has two names and then they diverge. For example, I-75 AND US XYZ are one road and then US XYZ diverges to the east and you continue on strait North along I-75, the nav with show you turning onto I-75 with strait arrows underneath indicating that you don't actually turn to "get on" I-75.
Keith