A method for permitting a target vehicle to safely violate a right-of-way system of rules is described. The method may comprise, amongst other things, providing a roadway system, wherein the movements of vehicles within the roadway system are governed by a right-of-way system of rules; controlling a traffic control system including a plurality of traffic control signals in a manner that causes the plurality of traffic control signals to change in accordance with default control pattern for implementing the right-of-way system of rules; and modifying the default control pattern. By doings so, the method may permit a target vehicle to safely violate the right-of-way system of rules. Similarly, by doing so, the method may prevent a plurality of secondary vehicles from traveling along or through a predicted path of the target vehicle.

A method for permitting a target vehicle to safely violate a right-of-way system of rules is described. The method may comprise, amongst other things, providing a roadway system, wherein the movements of vehicles within the roadway system are governed by a right-of-way system of rules; controlling a traffic control system including a plurality of traffic control signals in a manner that causes the plurality of traffic control signals to change in accordance with default control pattern for implementing the right-of-way system of rules; and modifying the default control pattern. By doings so, the method may permit a target vehicle to safely violate the right-of-way system of rules. Similarly, by doing so, the method may prevent a plurality of secondary vehicles from traveling along or through a predicted path of the target vehicle.

The present disclosure provides a method for controlling a traffic scheduling strategy in a smart city. The method includes obtaining traffic data information in a preset area during a current time period, the traffic data information at least including a speed of at least one vehicle on at least one road, predicting one or more target areas where traffic congestion is likely to occur from the preset area during a next time period based on the traffic data information in the preset area during the current time period, determining whether the traffic scheduling strategy is needed to be switched based on traffic data information in the one or more target areas during the next time period, and in response to determining that the traffic scheduling strategy is needed to be switched, switching a first traffic scheduling strategy to a second traffic scheduling strategy.

A control device included in each vehicle composing a vehicle group predicts a vehicle state of a subject vehicle before a traveling regulation point based on speed information of the subject vehicle, light color information of a traffic signal, and distance information between the subject vehicle and an entrance of the traveling regulation point. Based on the vehicle state, it is determined whether a vehicle of which the vehicle state corresponds to an unenterable state is included in the vehicle group. The unenterable state indicates a state where the subject vehicle cannot enter the traveling regulation point before the traffic signal is changed to the yellow light when its speed is maintained at a current speed. When it is determined that the vehicle in the unenterable state is included in the vehicle group, the subject vehicle is controlled such that it does not enter the traveling regulation point.

A control device included in each vehicle composing a vehicle group predicts a vehicle state of a subject vehicle before a traveling regulation point based on speed information of the subject vehicle, light color information of a traffic signal, and distance information between the subject vehicle and an entrance of the traveling regulation point. Based on the vehicle state, it is determined whether a vehicle of which the vehicle state corresponds to an unenterable state is included in the vehicle group. The unenterable state indicates a state where the subject vehicle cannot enter the traveling regulation point before the traffic signal is changed to the yellow light when its speed is maintained at a current speed. When it is determined that the vehicle in the unenterable state is included in the vehicle group, the subject vehicle is controlled such that it does not enter the traveling regulation point.

A method for managing an emergency state of a first vehicle, implemented by a remote server. The method includes: receiving an indication of the emergency state of the first vehicle; estimating a first geographical area in which the first vehicle is able to be positioned for a given time period; and sending an alert message to at least one detecting element, positioned at a traffic lane, said at least one detecting element being able to be positioned in the first geographical area for the given time period.

An emergency vehicle alert system includes a traffic control device having a transceiver. The transceiver is configured to receive a first signal and to transmit a second signal. A receiver is configured to receive the second signal from the transceiver and to initiate an alert upon receiving the second signal from the transceiver. The first signal is transmitted to the transceiver from an emergency vehicle and causes the traffic control device to transition from a first configuration to a second configuration. The transceiver transmits the second signal in response to the transceiver receiving the first signal.

An emergency vehicle alert system includes a traffic control device having a transceiver. The transceiver is configured to receive a first signal and to transmit a second signal. A receiver is configured to receive the second signal from the transceiver and to initiate an alert upon receiving the second signal from the transceiver. The first signal is transmitted to the transceiver from an emergency vehicle and causes the traffic control device to transition from a first configuration to a second configuration. The transceiver transmits the second signal in response to the transceiver receiving the first signal.

A traffic signal control system includes a processor configured to adjust a green time of a traffic signal based on vehicle class information on each of vehicles of a vehicle group approaching an intersection. The vehicle class information indicates whether the vehicle is an environmentally friendly vehicle or an environmentally unfriendly vehicle that is not the environmentally friendly vehicle.

A traffic signal control system includes a processor configured to adjust a green time of a traffic signal based on vehicle class information on each of vehicles of a vehicle group approaching an intersection. The vehicle class information indicates whether the vehicle is an environmentally friendly vehicle or an environmentally unfriendly vehicle that is not the environmentally friendly vehicle.