This is a bridleway (horse race track) that I traced out last year. The bing map is the stage/MassGIS data. I remember the same road line in OSM.
You can see that Google has traced out the same path I used through the parking lot, and incorrectly traced out the bridleway as a two lane road. Google map maker says it was made by "Google Automated Data Quality Improver 1" on July 24th. The nodes are not in the exact same places, I bet they are monitoring OSM, and setting up tasks for the 7,000 strong mapping army they employ to trace new segments by hand when something new pops into OSM.
Hey google, you should probably not copy highway=bridleway from OSM as roads.