Google Maps is reportedly rolling out a new feature intended to benefit users taking taxis or ride-shares in unfamiliar locations. It starts to send alerts if the vehicle in question starts to deviate from a given route by 500 meters or more. This new setting has only been observed in the Indian market so far, however.
https://www.notebookcheck.net/New-Google-Maps-feature-may-help-you-tell-when-taxis-are-taking-you-the-wrong-way.423700.0.html