Method and system for obtaining information about traffic-related devices providing variable information includes providing a vehicle with a map database including the location of the devices, determining the location of the vehicle, as the location of the vehicle is determined to be approaching the location of each device, as known in the database, obtaining an image of the device, and analyzing the image to determine the status of the device. The vehicle may be controlled based on the status of the device, which is optionally displayed to the driver or other occupant of the vehicle. For example, when the device is a stoplight, the method can detect if the driver of the vehicle is slowing the vehicle when the stoplight is red, and if not, automatically cause the vehicle the slow down or stop.