A hardware traffic control device controls vehicular traffic on a one-way roadway. A hardware sensor detects vehicular traffic on a roadway in order to enable a hardware traffic control device to determine that the vehicular traffic on the roadway has been moving exclusively in a first direction during a preceding period of time, thus identifying the roadway as a one-way roadway in which current vehicular traffic is authorized to travel only in the first direction. The hardware sensor then detects an errant vehicle that is traveling in the opposite direction on the one-way roadway. A disabling electronic signal is then transmitted from the hardware traffic control device to disable a distracting electronic device within the errant vehicle.