If we notice a blocked road, and using MRA (with Android Auto), i think having and option on the navigation menu for "blocked road", will be usefull (while driving)
I'm in Quebec (Canada), and it's forbiden to touch a phone screen while driving (approx 400$ fine + lost driving licence point) if we got caught doing it. So been able, to use the control on the handle (or any other bluetooth version that exist) and access on the same place we click "stop" to pause our ride.. and been able to select something like "road blocked in front" .. will be a good "nice to have".. as it will tell the MRA to recalculate and go to the next point that is after the blocked road !
I usually look and MRA and gMAPS in the morning before my trip, and adjust to avoid known blockade, closed road (construction).. and sometime after a hudge storm.. avoid those that suffer damage (usually closed anyway)... But sometime.. Surprise.. i'm in front a blocked one i didn't see.. and it's not necessary easy to stop somewhere to change thing (as the Android Auto version as less option that the Phone version)