The navigation "activity" still exists within the source code. You simply need the means to create a shortcut that calls that activity, since that shortcut no longer exists in the drawer by default. Here's one very easy way: 1) Install Nova Launcher (free version is fine). You don't even need to USE the launcher. Stick with your normal launcher. 2) Add an "activity" widget to your home screen (Nova made these available to you). When setting it up you choose Maps > Navigation 3) Enjoy your new (old) shortcut, and feel free to uninstall Nova Launcher if you don't want it.