Induced the LED screen in the applications of urban road traffic

In the research and development of intelligent transportation system, the construction of induced traffic LED screen is to solve the traffic congestion, guarantee traffic safety, one of the major means of increasing the service efficiency of traffic network. Traffic-induced screen is used to receive real-time dynamic road traffic conditions and the traffic administrative department of the command and dispatch instructions, etc. , in a timely manner according to a variety of road traffic flow can be induced to notice and guidance information, effectively to induction of traffic flow, control and equilibrium traffic flow distribution reasonably, improve the utilization of existing roads, provide good service for the drivers driving safely and quickly. Induced

screen is made up of ordinary road sign board and variable message sign of multifunctional information display. According to the LED in the induction of the layout of the screen is divided into local induced induced LED screen and all the LED screen, induced local LED screen in present road whole line contour graphic way provide to the driver to the road ahead, have the function of the signpost, stretch marks in the static graphics area enchase LED variable band, to indicate the fixed section of road conditions. Induced all LED screen in the plane according to certain density is full of LED tube, through a dedicated computer or MCU control destroy the light of specific LED luminous tube to display the traffic and text messages. All LED induction without can show its information, also can be used as urban emergency information, instant messaging, publicity information publishing platform. Both induced screen is through the different color LED light-emitting, image sign these sections in the open, Green) , jam ( Red) Or crowded ( Orange) State of live traffic for driver to judge and select the appropriate route, have the effect of induced traffic.

play a role of the induced induced the LED screen to general coordination processing need the following systems: one is based on traffic information acquisition and processing; 2 it is to induce information generated; Three is the induced information release.

one, the basic traffic information acquisition and processing of

basic traffic information could be divided into two types: dynamic information and static information. Dynamic information is mainly refers to the traffic data of change over time, such as roads, average speed, traffic congestion, the accident state, etc. , generally comes from all kinds of road surface detector, such as annular coil, microwave detector, video detector, beacon vehicles, etc. , or artificial report, such as a telephone alarm, traffic patrol report, etc. Static information refers to does not change with time data, the status quo of electronic map information such as road, detector and all kinds of traffic management, control, equipment installation and configuration information, etc. Based on traffic information collection on all kinds of testing equipment, including the toroid, microwave detector, video detector, beacon, GPS vehicle on-board record information, etc.

2, the generation of induced traffic information

induction information generation by generation divided into two kinds of manual and automatic. Artificial induction information generated, it is by the traffic management personnel according to the traffic and road conditions, combined with previous experience, choose the appropriate induction information, human input system, it is relatively low-level induced traffic information system usage. Induced information generated automatically, is the core of intelligent traffic induced information system, the main distribution of the optimal control based on dynamic traffic flow model and the algorithm, such as the complex traffic flow prediction model and algorithm of traffic analysis model and algorithm, induced by computer software automatically generated information, this is the use of the induced traffic information system more advanced way.

3, inducing information published

induction information release according to the information of the receiver, step by step. Induced screen release system, according to the types of induction of screen size, screen points much divided into several categories, respectively to the various outdoor LED display on the road of misleading information, which is currently widely development and adopt the main way of induced traffic information release.

but more due to the process of from traffic information acquisition and processing to the generation of induced traffic information to induce the release of information, no matter which link takes time and more complex operations, and release delay errors are the disadvantages of traditional induction information system now induction system needs a more convenient and more rapid process, combining with the practical application in this paper, a new type of induction information release form. Control center through GPRS or fiber induced presets to screen the information within the memory of control system, local induced LED and the LED screen, control software and control method on have substaintial distinction, in induced different screen, write the corresponding control software can be induced by center control screen, can be directly controlled by police on duty. City rush hours on duty, the main roads have police traffic information collected directly by police, generated on-site induction information, through remote control method of controlling the induction to the nearest screen content, timely, accurately and quickly. The first time given the traffic flow control, can more effectively tap vehicles, alleviate traffic.

anyhow because many large and medium-sized cities development is rapid, vehicles on the road traffic is more and more crowded, and pointed out a clear path for drivers, can largely alleviate traffic pressure, with the appearance of display intuitive, visual cognition time is relatively short, large amount of information, for the driver and directions, not familiar with the road induced significant advantages of the LED screen, road and highway main trunk road network in the city populated area more and more important role.