You're welcome to switch the segment to smoothness (https://wiki.openstreetmap.org/wiki/Key:smoothness) to some other value. I'm not exactly sure what the value should be since I haven't seen a recent picture of the road. The access=no is the important part of the change.

Uploading a recent photo to Mapillary is a great idea, especially at both ends of the closed road. Then other mappers will get a better idea of what the road conditions are.

As far as using other data sources, you should be very careful. Google Maps is copyrighted material and should not be used in OpenStreetMap. See the following for more details. https://wiki.openstreetmap.org/wiki/FAQ#Why_don.27t_you_just_use_Google_Maps.2Fwhoever_for_your_data.3F