After getting such a great response from our first round of circular flat icons, we decided to keep growing the collection! We have added a set of transportation themed icons and will continue to add to the pack. The icons come in two sets: full color and single color and they come in .ai, .eps, .pdf, and .png (64px and 128px). These icons are completely free and Open Source under the GPL, so feel free to use them in your personal and commercial projects alike. We are on a mission to create the best collection of Open Source graphics on the web, so that the WordPress ecosystem can use and enjoy them alongside the freedoms they have become accustomed to. Stay tuned for more great stuff! Download the full set here!