Generally discussed herein are methods and apparatuses that can reduce conflicts in an area including vehicles. An apparatus can include transceiver circuitry, and conflict detection circuitry to receive a position of a vehicle in a geographical area that is segmented into discrete cells, determine whether the position is situated in a cell of the cells that includes a polygonal area representing an extended restricted area within the cell, and the extended restricted area completely within the polygonal area, in response to a determination the position is situated within the polygonal area, determine whether the position is situated within the extended restricted area, and in response to a determination the position is situated within the extended restricted area, provide one or more signals to the transceiver circuitry to cause the transceiver circuitry to transmit an alert to the vehicle indicating that a conflict exists.