Controlling vehicular traffic on a one-way roadway

1. A method of controlling vehicular traffic on a one-way roadway, the method comprising:

detecting, by a hardware sensor, vehicular traffic on a roadway;

determining, by a hardware traffic control device, whether the vehicular traffic on the roadway has been moving exclusively in a first direction during a preceding period of time;

in response to determining that the vehicular traffic has been moving exclusively in the first direction during the preceding period of time, identifying, by the hardware traffic control device, the roadway as a one-way roadway in which current vehicular traffic is authorized to travel only in the first direction;

detecting, by the hardware sensor, an errant vehicle that is traveling in a second direction on the one-way roadway, wherein the second direction is opposite the first direction; and

in response to determining that the errant vehicle is traveling in the second direction on the one-way roadway, transmitting a warning signal to other vehicles on the one-way roadway, wherein the other vehicles exclude the errant vehicle.

2. The method of claim 1 , wherein the warning signal to the other vehicles causes flasher lights and horns on the other vehicles to activate.

3. The method of claim 1 , wherein the warning signal to the other vehicles causes the other vehicles to reduce a speed at which the other vehicles are traveling.

4. The method of claim 1 , wherein the hardware sensor comprises a pair of electronic signal emitters, wherein the pair of electronic signal emitters comprises a first electronic signal emitter and a second electronic signal emitter, wherein the first electronic signal emitter is spatially positioned before the second electronic signal emitter when moving in the first direction, and wherein the method further comprises:

transmitting a first electronic signal from the first electronic signal emitter;

transmitting a second electronic signal from the second electronic signal emitter, wherein broadcast ranges of the first electronic signal and the second electronic signal are less than a distance between the first electronic signal emitter and the second electronic signal emitter, and wherein receipt, by an electronic signal receiver in the errant vehicle, of the second electronic signal before the first electronic signal causes an electronic response within the errant vehicle.

5. The method of claim 4 , wherein the pair of electronic signal emitters are radio frequency identification (RFID) chips.

6. The method of claim 1 , wherein the hardware sensor is an electromagnetic carrier wave transceiver, and wherein the hardware sensor further comprises:

aiming the electromagnetic carrier wave transceiver at the vehicular traffic on the roadway;

receiving a reflected carrier wave signal at the electromagnetic carrier wave transceiver;

utilizing a first Doppler shift for the reflected carrier wave signal to identify the vehicular traffic that is traveling in the first direction on the one-way roadway; and

utilizing a second Doppler shift for the reflected carrier wave signal to identify the errant vehicle that is traveling in the second direction on the one-way roadway.

7. The method of claim 1 , further comprising:

receiving, by a photoreceptor, light from a headlight on the errant vehicle, wherein the photoreceptor is in electronic communication with a warning sign that is adjacent to the one-way roadway, and wherein the photoreceptor and the warning sign are aimed away from the vehicular traffic that is moving in the first direction on the one-way roadway; and

in response to receiving, by the photoreceptor, light from the headlight on the errant vehicle, illuminating the warning sign.

8. The method of claim 1 , further comprising:

retrieving, by one or more processors, a historical record of traffic flow on the one-way roadway; and

confirming, by one or more processors, that current vehicular traffic is authorized to travel only in the first direction based on the historical record of traffic flow on the one-way roadway.

9. The method of claim 1 , further comprising:

in response to detecting the errant vehicle, transmitting, from the hardware traffic control device, a disabling electronic signal to disable a distracting electronic device within the errant vehicle, wherein the distracting electronic device has been predetermined to reduce a driver's attention to driving a motor vehicle.

10. The method of claim 9 , further comprising:

transmitting an emergency activation signal to the distracting electronic device, wherein the emergency activation signal overrides the disabling electronic signal to permit only a warning message to be presented by the distracting electronic device.

11. The method of claim 1 , further comprising:

in response to determining that the errant vehicle is traveling in the second direction on the one-way roadway, transmitting, to a hardware vehicle controller within the errant vehicle, a signal to automatically decrease a speed at which the errant vehicle is traveling.

12. The method of claim 11 , further comprising:

receiving, from the hardware vehicle controller within the errant vehicle, an override signal from a driver of the errant vehicle, wherein the override signal blocks said automatic decreasing of the speed at which the errant vehicle is traveling.

13. The method of claim 12 , further comprising:

receiving, from the hardware vehicle controller within the errant vehicle, the override signal based on a proximity of the errant vehicle to an emergency aid facility, wherein the override signal is generated in response to the errant vehicle being within a predefined distance from the emergency aid facility.

14. The method of claim 11 , further comprising:

in response to determining that the errant vehicle is traveling in the second direction on the one-way roadway, transmitting a steering signal to automatically steer, by a hardware vehicle controller within the errant vehicle, the errant vehicle to a side of the one-way roadway.

15. The method of claim 14 , wherein the hardware vehicle controller within the errant vehicle automatically steers the errant vehicle to the side of the one-way roadway only after a predetermined length of time has elapsed without a driver of the errant vehicle taking corrective actions to prevent the errant vehicle from traveling farther in the second direction on the one-way roadway.