Symbolizing road overpasses or underpasses typically requires that you perform two data preparation steps. First, identify which roads overpass other roads. This may be very simple intersections between two roads, or it may include many other roads when dealing with complex highway interchanges. Second, represent the interchanges clearly. This task may mean simply changing feature or layer drawing order, or it can also mean knocking out or masking portions of underpassing features. The image to the left shows the underpassing highway being masked by an overpassing street and railroad. Read More...
