I have used the Sioux Falls data for a research project, and I am not clear about the license.
Can I download the Sioux Falls data, modify it locally to perform research. Then publish the paper, with a citation to "Transportation Networks for Research Core Team. Transportation Networks for Research. https://github.com/bstabler/TransportationNetworks. Accessed Month, Day, Year." and make the modified data available online?

Also, is it possible to attach an Open Source license to this repo?

Thank you a lot!