An approach is provided notifying a user while he or she is driving of an unmapped crossing to prevent the user from unintentionally obstructing access to the crossing. A traffic platform processes and/or facilitates a processing of traffic information associated with at least one crossing to determine one or more traffic conditions. The traffic platform determines that the one or more traffic conditions may at least potentially cause at least one obstruction of at least one other crossing by at least one vehicle. The traffic platform further causes, at least in part, a presentation of at least one notification regarding the at least one obstruction to at least one device associated with the at least one vehicle, at least one other vehicle that is potentially affected by the at least one obstruction, or a combination thereof based, at least in part, on the one or more traffic conditions.