Big data traffic signal

The big data controlled traffic signal control machine (hereinafter collectively referred to as the signal control machine) implements GB25280-2016 "Road Traffic Signal Control Machine", and communicates with the host computer in accordance with the Appendix A communication protocol of GB 25280-2016 "Road Traffic Signal Control Machine" and is compatible NTCIP (National Transportation Communications for ITS Protocol) protocol.It is a networked big data traffic signal control machine based on open standards.The traffic signal control machine implements a variety of intelligent traffic control algorithms in response to the current domestic traffic situation. It has completely independent intellectual property rights, is powerful in function, stable in performance, easy to use, and can fully meet the requirements of modern intelligent transportation systems.

Compared with products in the same industry, it has advantages: 

The big data control signal machine is independently developed and produced by our company. Seamless docking between various devices can be achieved without the need for a third party to intervene in the docking, avoiding the phenomenon of buck-passing between various equipment manufacturers. .· 

The signal machine itself has a video vehicle detector, which is a vehicle detection equipment independently developed by our company. It can use the intersection electronic police camera to collect vehicle information. There is no need to install an additional camera. As long as the camera is operating normally, vehicle information can be collected. Collection not only integrates resources, but also saves money.The video vehicle detector has achieved the leading domestic scientific and technological achievement evaluation level.· 

The geomagnetic vehicle detector matched with the big data control signal is a vehicle detection equipment independently developed by our company and can be seamlessly connected with the signal. The geomagnetic vehicle detector has been tested by the Supervision and Inspection Center of the Ministry of Public Security.· 

Big data traffic signals can exchange with real-time road condition data through the Internet (such as Baidu map road condition data, Amap road condition data and other big data map road condition data, etc.), change the control plan in real time, and solve unexpected traffic Congestion problem.· 

The signal has a bus priority (BRT) function, which can solve the problem of buses traveling in different directions on the same bus lane, especially the problem that the bus behind needs to travel but is blocked by the bus in front.·

 It has a fault short message alarm function. When the signal light does not light up, there is a line failure, leakage, power outage at an intersection and other problems, the fault information is automatically sent to multiple designated mobile phones to achieve signal management.· 

It has light rail priority and train priority control functions, especially for cities that build light rail in the future, it can be done in one step to avoid repeated investment and waste of resources.· 

Able to realize two-way green wave belts. By calculating the distance and operating speed between adjacent intersections, two-way green wave belts and longitudinal green waves can be realized.· 

The inductive green wave belt can be realized, that is, the redundant time in the non-green wave belt direction is compressed, and the green wave belt direction time is used to allow more vehicles to pass through the main road.· 

The signal has a variable electronic sign output control function, which can realize multi-period control. The electronic variable sign does not need a separate external controller. Electronic variable signs, variable electronic lane indicators and other electronic signs and signal switching Stay in sync.· 

The signal machine has the function of inducing information output, which can directly output and control the LED inducing information display screen, which directly eliminates the traditional LED display screen that only relies on learning as the main passive display method, and also eliminates the possibility that the LED display screen cannot function normally after changing the signal light phase. display problem.· 

Asymmetric release can be realized. When it is detected that the vehicle reaches the set asymmetric release conditions, asymmetric release will be automatically started.· It has APN remote communication function and supports dual network port communication function. When one line fails, the other line will automatically start to communicate with the command center.

Functional requirements

 (1) Traffic signals connected to the central control system through regional adaptive control network can accept control instructions issued by the central control computer and coordinate and optimize parameters to achieve coordinated control of traffic signals at multiple relevant intersections.Through regional coordinated control, local or entire area intersection traffic lights can be optimized and controlled by the central control system to achieve signal timing, ensuring that the number of stops and delays in the area is small.

(2) The intersection traffic signal control machines in the trunk line coordination control control area are all under the control of the regional computer. The line coordination signal timing and phase difference scheme is generated in real time by the line coordination adaptive optimization algorithm module based on the real-time traffic flow conditions.At the same time, different green wave control schemes can be implemented at different time periods, that is, the green wave control parameter settings are different at different time periods. The appropriate coordination control scheme can also be called from the local scheme library according to the real-time traffic flow parameters of key intersections to achieve green wave control. Band control.

(3) Emergency vehicle green wave control (guard task) The traffic signal control system has emergency vehicle control function.The system can receive requests from special vehicles such as police, firefighting, ambulance, and rescue vehicles, and can prioritize the requests of the above-mentioned various vehicles according to the degree of urgency. At the same time, the system adjusts the corresponding intersection light color changes according to the actual situation to achieve emergency vehicles. "Green Wave Control".After the emergency vehicle passes, the system can return to its original operating state and evacuate the vehicles stranded due to the passage of the emergency vehicle as soon as possible.

(4) Bus priority control The traffic signal control system should have a bus priority control function. The system should have a bus signal priority activation/deactivation scheme, which can add or cancel the bus signal priority scheme settings, and can be activated or deactivated through timetables or manual calls. Deactivate the bus signal priority control scheme.While the system selects signal priority for dedicated bus lines, it should also achieve a coordinated control function on the bus routes.

(5) The plan control system calls the user-preset multi-intersection control plan stored in the center and sends it to the relevant intersections for execution, so that signal timing can be adjusted in time in case of severe weather and emergencies.

(6) The central remote control can adjust and modify the characteristic parameters and timing parameters of the intersection traffic signal control machine; when connected to the Internet, the central control system can remotely read and issue plans from the traffic signal control machine.

(7) Phase locking control can issue commands to directly and forcibly control the execution phase and phase execution time of intersection traffic signals based on requirements such as security tasks or traffic diversion.

(8) Intervention The yellow flash control center control and management system can control the yellow lights of traffic lights to flash at a certain frequency to issue warnings or prompts to vehicles and pedestrians.

(9) The intervention light-off control in the manual intervention function can issue a light-off instruction to the intersection traffic signal control machine, so that the traffic signal control machine controls the traffic signal light to be in a light-off state.

(10) Degradation control fault degradation sequence can be set by the regional control machine.When other faults such as communication interruption occur, it can be downgraded to cableless coordinated control or further downgraded to single-point control; it can be downgraded to single-point full induction control, single-point half-induction control, multi-period timing control, etc.

(11) Remote monitoring and maintenance of real-time phase monitoring.When the traffic signal status changes (phase change, time period change, control plan change, etc.), the traffic signal will report the working status of the traffic signal to the center. The central control system can monitor the real-time phase light color and plan information of the traffic signal.