[hahaker]

This seems very useful, but isn't Google Maps doing similar stuff already? And if not, what are their concerns?

[tapan_pandita]

The Google Maps APIs are point in time. Using OSM and Kalman filters, we can continuously snap points to the road in realtime. Plus it's a lot faster doing it on our own database than calling external APIs.

[sureshv]

It's called snap to roads (interpolated mode): https://developers.google.com/maps/documentation/roads/snap