Source for building the dfns tube planner workspace (tube.dws)

]DBuild path/tube.dyalogbuild

Feel free to submit pull requests for files in the sources directory, both with corrections to already included cities, and with entirely new cities.

The format for simple routes should be fairly self-explanatory. notes/tube.txt describes the exact format for the more complicated constructs; forks, crosses, and one-way sections, while notes/source.txt demonstrates their use in a minimal route network.

Contributions will be acknowledged at the bottom of notes/tube.txt.