Arrival Alert

With Arrival Alert you can add alerts to arrive anywhere. You initiate an alert and when you are near the place the app awake. You can add bookmarks, you have access to special settings to enable and disable Wi-Fi (to improve the location), among other features. You also get a widget for tracking, if you want.
With this app, you can take that nap on the bus without fear of overshooting.
It is essential that you conduct testing to know where, more or less, the app will alert you.