In no particular order, and I'm just spitballing here. Meant as a talking point.
1) Software stuff
- create map generator
- create highway browser
- create stats pages
- create tools (wpt editor, concurrency check, labels in use,
- create forum
- create .css / site design
- create home page and other static pages (manual, sources, etc)
- create site-wide log in system
- create .list file uploader (for all users)
- create highway data update system (for collaborators only)
- create process that redraws the maps and updates the stats (automatically running daily?, biweekly?, weekly?)
- update highway data so up-to-date
- finish peer review of systems in that process
2) Hardware stuff
- get server
- upload stuff to server
3) People stuff
- contact existing and past collaborators
- contact existing users of the site
- sort out how the project is going to work
4) Moving beyond the basics
- new systems
- new collaborators
- better borders in Eurasiafrica
- .list file creator