Sophia's new metro (2sur4)

Contact : patrick.colsenet@gmail.com

Enseignant Lycée Touchard-Washington Le Mans

Bulgarian metro 4 out of 10

In June 2018, Dimitar Dobrev patented in Bulgarian, a metro with 4 stops at 10 stations

This metro stops at stations 1, 3, 6, 10, 11, 13, 16, 20, 21, 23, 26, 30 ....

Travelers need to know which of the 4 subways stopping at the station they are at goes to their destination station, and 10 different station colors and 4 colors are needed for each subway.

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