Traffic light phase timing effectiveness is determined. Connected vehicle data indicative of traffic conditions for one or more intersections is received. Factors from the connected vehicle data that are indicative of intersection performance are identified. The factors are weighted according to defined weights to determine an intersection score. Based on the score failing to meet one or more criteria, an alert to adjust intersection cycle is provided.

Traffic flow control. A method identifies traffic in an area. The traffic includes traffic objects. The identifying obtains identifiers of traffic objects in the area. Each traffic object is identified by a respective identifier of the traffic object identifiers. The method also dynamically assigns weights to the traffic objects based on pre-established traffic criteria. Each traffic object is assigned a respective weight of the dynamically assigned weights. The pre-established traffic criteria each include at least one weight value. The weight assigned to a traffic object is based on the weight values of a set of traffic criteria, of the pre-established traffic criteria, applicable to the traffic object and reflects a level of prioritization of a right-of-way of the traffic object. The method also controls flow of the traffic in the area. The controlling the flow includes controlling at least one traffic control signal based on the dynamically assigned weights.

A system and method for adapting traffic light assist applications (2) of connected road vehicles (3) to queue lengths at intersections (4) having connected traffic lights (6). Each vehicle (3) is arranged to: communicate to a back-end logic (9) a position thereof; and determine, using data from sensors (12) thereof, if that vehicle (3) is located within, or if it is the last vehicle (V.sub.n) in the queue (11). The length (I.sub.qv) of the queue (11) from that vehicle (3) up to the traffic light (6) is determined. If determined that that vehicle (3) is the last vehicle (V.sub.n) in the queue (11), traffic light assist applications (2) of vehicles (3) approaching that traffic light (6) are adapted (106) to the thus determined length (I.sub.qtot) of the entire queue (11). If determined that that vehicle (3) is located within a queue (11), traffic light assist applications (2) of that vehicle (3) are adapted (107) to the thus determined length (I.sub.qv) of the queue (11) in front thereof.

An oscillator unit for a vehicle detector includes an oscillator circuit for generating vehicle detector loop signals in response to enabling control signals from a vehicle detector control unit, a gain control circuit for maintaining the amplitude of the oscillator output signals within a limited range, and a clamping circuit for eliminating ringing of the oscillator output signals when operation of the oscillator circuit is disabled. The gain control circuit eliminates random amplitude changes in the vehicle detector loop signals generated by the oscillator circuit caused by changing environmental conditions experienced by the vehicle detector loop. The clamping circuit provides immediate clamping of the oscillator circuit operation to eliminate ringing when the control signal switches to the off state. The few additional circuit components which provide the gain control and clamping functions add very little to the overall cost of the oscillator circuit.

A system and method are provided, wherein the system includes a traffic control signal, a wireless interface, a mast, a support base, a wireless control device, and a base station for communicating between the wireless interface and the wireless control device. The method involves receiving input from the wireless control device, generating a control signal for operating the traffic control signals, and transmitting the control signal to the traffic control signals.

A system and method are provided, wherein the system includes a traffic control signal, a wireless interface, a mast, a support base, a wireless control device, and a base station for communicating between the wireless interface and the wireless control device. The method involves receiving input from the wireless control device, generating a control signal for operating the traffic control signals, and transmitting the control signal to the traffic control signals.

Technologies for intelligent traffic optimization include a directional flow server that receives dynamic traffic data from traffic infrastructure devices in a monitored region. The traffic data may include traffic volume data and traffic control status data. The server updates a dynamic layer of a high-definition map based on the dynamic traffic data. The high-definition map also includes a static layer and a directional flow layer. The server optimizes the directional flow in response to updating the dynamic layer. The directional flow layer is indicative of traffic direction associated with roads in the monitored region. The server may optimize each of several sub-regions and then optimize connection roads between the regions. The server may distribute the optimized directional flow layer to consumers such as traffic control devices, autonomous vehicles, and other subscribing devices. Other embodiments are described and claimed.

Provided are system and method for controlling traffic lights. The system includes a traffic light device and a smart roadside device. The smart roadside device includes a roadside sensing module including: a camera assembly configured to collect information of an image for traffic lights of the traffic light device and a radar configured to acquire first surrounding environment information of a road junction monitored by the smart roadside device, and a roadside processing module configured to determine traffic flow information of a red light lane according to the first surrounding environment information and the information of the image for the traffic lights, determine a duration of a green light according to the traffic flow information, and control a duration displaying the green light in a next cycle of the traffic light device according to the duration of the green light.

Provided are system and method for controlling traffic lights. The system includes a traffic light device and a smart roadside device. The smart roadside device includes a roadside sensing module including: a camera assembly configured to collect information of an image for traffic lights of the traffic light device and a radar configured to acquire first surrounding environment information of a road junction monitored by the smart roadside device, and a roadside processing module configured to determine traffic flow information of a red light lane according to the first surrounding environment information and the information of the image for the traffic lights, determine a duration of a green light according to the traffic flow information, and control a duration displaying the green light in a next cycle of the traffic light device according to the duration of the green light.

A traffic indicator warning unit for preventing collisions in blind corners has a weather-resistant chassis, a rechargeable battery within the chassis configured to power the unit, an indicator assembly mounted to the chassis comprising a first indicator light configured to indicate to a driver to stop and wait, and a second indicator light configured to indicate to a driver that the unit is non-operational, and further a motion-detector mounted to the chassis, configured to detect a moving vehicle near the unit, a metal detector mounted to the chassis, configured to detect the metal in a vehicle near the unit, and a transmitter/receiver within the chassis having an antenna, wherein the transmitter/receiver is configured to communicate with one or more other traffic warning units. A method of use of a traffic indicator warning system for a blind corner system is also disclosed.