The described principles provide a method and system for identifying potentially closed roads and potentially open roads based on reroute requests, and of accommodating the potential road closure. If a reroute request is received from a user on a given route, the avoided roads of the route may be deemed potentially closed. If a predetermined number or a statistically significant number of users treat the road as potentially closed in this manner, it may be deemed closed. Similarly, if a supposedly closed road is chosen by a predetermined number of users, as evidenced by reroute requests, then the supposedly closed road may be deemed to be open. Moreover, observation of reroute requests also allows the system to automatically learn a user's route preferences.