Mail.ru has
launched an analog service for Yandex, which has been
operating for a long time for finding optimal routes for trips to the subway.
What is interesting is the difference in travel time for the same route given by these services.
Mail.ru:

Yandex:

')
I myself often use the metro scheme from Yandex. Travel time, real and calculated, sometimes differs by a couple of minutes (and Yandex
warns about this). But how, probably, the users who believed the mail and went to some important meeting were upset.
Habralyudi, be careful! :)