A navigation system that includes a processor, a satellite antenna communicatively coupled to the processor, a memory module communicatively coupled to the processor, a route list stored in the one or more memory modules, and machine readable instructions stored in the memory module that cause the navigation system to perform at least the following when executed by the one or more processors: receive the signal from the global positioning system satellite; transform the signal into a current location of the navigation system;
track a travel route relative to the current location until conclusion of the travel route; determine whether at least one route candidate from the route list includes the travel route; and generate an inquiry to identify the travel route as a consistent route in response to determining at least one route candidate from the route list does not include the travel route.