1. A method of controlling a motor vehicle with a control system, the method comprising: monitoring, with the control system, the motor vehicle at or near an intersection of a first roadway and a second roadway; determining, by the control system, whether traffic control information associated with the intersection is stored in a database available to the control system; wherein, upon a determination by the control system that traffic control information is not available for the intersection, the control system estimating a type of intersection control device associated with the intersection by performing a steps of: retrieving a first characteristic of the first roadway; retrieving a second characteristic of the second roadway; associating the first roadway with a first class using the first characteristic to select the first class from a plurality of classes according to a roadway classification scheme; associating the second roadway with a second class using the second characteristic to select the second class from the plurality of classes; comparing the first class and the second class; and determining the type of intersection control device based on the comparison of the first class and the second class, the intersection control device being associated with the first roadway; wherein the step of determining the type of intersection control device for the first roadway is followed by a step of determining a type of intersection control device for the second roadway.