Google Maps: mark road as Closed on iPhone/mobile (Directions)
Unfortunately you can’t report a road closure when using directions.
You can do it by going in Contribute tab &gt; Edit map &gt; Report a problem with map data &gt; Selected the road &gt; “Closed Road”.
Note that it won’t be closed on the map until an employee verifies it manually (it can take up to a month).
As @chenmunka suggested it you can also report it as closed on Waze, some of the closures are shared to Google Maps.