This tutorial will guide you to create road maps in Illustrator CS3.
Create a new document. Draw a straight line.
Copy and paste the line in the same place. Create a new line with a thinner stroke and colour it with white.
Choose both the strokes and click New Brush icon in the brushes window.
In the next dialog box you can name your new brush. Use the following settings.
Your new brush will appear in the Brushes Palette. Repeat the previous steps to create more brushes to make different roads.
You can use circles to create matching icons.
Just create the road paths and the roads will be ready.