When a faster route is found, you are asked if you want to take the faster route.
Tip: To be asked to select a route, select Ask me so I can choose in the Route Planning menu in Settings.
If you've not already selected the faster route, as you approach the faster route it is shown on the guidance view in green. A decision symbol is shown in the route bar.
To select the faster route, take the green route shown. Your device automatically displays your new route.
To ignore the faster route, just continue following your current route.
To get more information about the faster route, select the decision symbol in the route bar. The map opens zoomed in on the location where you have to take the new route.