Headway (<a href="https://github.com/headwaymaps/headway">https://github.com/headwaymaps/headway</a>), a free and open mapping platform, has some new functionality to enable transit directions on planet scale instances. maps.earth is our planet scale demonstration site.<p>I posted here both to advertise the new feature for people who might interested in using it, but also in hopes of getting feedback on the approach from people who are familiar with the space.