This is a work in progress implementation of a solver that can generate simplified transitmaps. It currently (tries) to implement the model proposed by Nollenburg & Wolff (2011). It also draws from the thesis of Nollenburg (2005).
Nollenburg, M., & Wolff, A. (2011). Drawing and labeling high-quality metro maps by mixed-integer programming. IEEE Transactions on Visualization and Computer Graphics, 17(5), 626-641.
Nollenburg, M. (2005). Automated Drawing of Metro Maps (Master thesis, Technical University of Karlsruhe). Retrieved from http://i11www.iti.kit.edu/extra/publications/n-admm-05da.pdf