A device, system and method for controlling speed of a vehicle are provided. The device includes a locational information module for determining location information and speed, a storage module for storing at least one geographic map including at least one route, and a speed limit for at least one route. Further, the device includes a processing module configured to receive the location information and retrieve at least one geographic map based on the location information. The processing module is configured to determine a speed limit based on the location information, compare the speed of the device to the determined speed limit, and a display module for alerting a user if the speed of the device exceeds the determined speed limit. The system and method can be for communicating a subject vehicle's speed to a central server and be utilized to analyze traffic congestion patterns or notify selected companies or individuals.