There is much to discuss concerning this image’s use of lines: the implied direction, the overlapping of paths, as well as the use of multiple layers of lines (i.e. the grid in the background). Also, this image uses very intense colors in a way that pleases the user aesthetically while providing important information (i.e. telling the user where to get on/off). The precise labeling and organization of this map is also worth discussing because there is a plethora of information that is being explained. Other principles (navigation, time, point of view, and interpretation) can be applied to the utilization of this image as well.