Compound expressway on-ramp traffic control and guiding device and method

The invention relates to compound expressway on-ramp traffic control and guiding device and method. The device comprises a display screen substrate (6), a traffic control LED display screen (8), a traffic guidance LED display screen (9) and an LED display drive control circuit, wherein the traffic guidance LED display screen (9) is installed at the upper part of the display screen substrate, the traffic control LED display screen (8) is installed at the lower part of the display screen substrate, the LED display drive control circuit is connected with and controlled by a microcontroller, and LED red light drive, LED green light drive and dynamic refreshment in an LED module are realized through the control of the microcontroller. The device has simple structure and is installed at the expressway on-ramp part to supply traffic control function for an on-ramp and also help a driver select the expressway inlet or outlet according to guidance mark display information so as to keep away from jam, and thus the jam at a jammed off-ramp can be further prevented from intensification.