[TheRealWatson]

Google Maps does real-time route correction based on traffic delays. I'm not sure about any rules applied for avoiding specific local streets but it definitely warns you about traffic ahead and suggests an alternative route. It also uses historic data to estimate travel times if you tell it when (day, time) you want to leave or when you want to arrive somewhere.

We like to think of all the NIMBY's and school streets but these types of "shortcuts" suggested by mapping apps is also what sometimes leads people into dangerous neighborhoods and tragic consequences.