I'm currently crossing a major transportation project here at the moment where a road is being lowered to become an underpass while bridges/intersections are constructed over it including a rail bridge over the whole lot.
Lots of commercial and residential properties were acquired and cleared to widen the roads. Temporary roads and roundabouts were constructed while work was done and some of those detours no longer exist.
Example: Port Road and South Road, South Australia.
Once the project is complete there will be images which will be showing the opposite direction of the current road and with a view of things that no longer exist including temporary signs which are no longer there. It would be good if images/sequences/time periods could be marked as no longer current or for historical value only so they aren't used as a reference like OpenStreetMap where the database is always based on the present.
Note: I have been doing some updates to OSM in this area based on my latest tracking from Mapillary.