An electronic communication device is able to be coupled to a sensor and is intended to be installed in the road or embedded in a vehicle. The device includes a determining module configured to determine a tracking list for at least one traffic element detected by the sensor. Each tracking list includes several information elements. The traffic element is located within a geographical zone covered by the sensor. A computer is configured to compute, as a function of at least one determined tracking list, a motion limitation setpoint for each vehicle located in the geographical zone. A transmitter is configured to send the computed limitation setpoint(s) to an electronic supervision equipment item via a data link.