AutoCAD Civil 3D contextual ribbons include a Launch Pad panel that provides access to commands that you might use next in your workflow.
For example, when you select an alignment object, the Alignment contextual tab is displayed. The Launch Pad panel on the Alignment contextual tab provides a variety of commands that you may want to do next. For example, you may want to create a corridor, intersection or data shortcut from the alignment.
Similarly, the Launch Pad on the Corridors contextual tab provides access to the variety of commands that you may want to select while you have a corridor object selected. For example, you can access the Create Sample Line command and the Create Feature Lines From Corridors command, among others, from this Launch Pad.