Traffic guidance displays are an important traffic management tool, primarily used to disseminate traffic information and guide drivers in choosing appropriate routes to alleviate traffic congestion and improve road efficiency. In China, the design, manufacturing, installation, and use of traffic guidance displays must comply with certain national standards.
I. Specifications and Dimensions
The specifications and dimensions of traffic guidance displays are mainly determined by their location and functional requirements. Commonly, the bottom edge of the display screen should be no less than 0.5 meters and no more than 2.5 meters above the ground to ensure that drivers can clearly see the information on the screen within a suitable viewing angle.
II. Display Content
The display content of traffic guidance displays should include "slow" and "S" shaped signs, guidance strips, distance markers, direction indicators, and text information. All displayed content should be clear and legible to ensure that drivers can accurately understand the information on the screen.
The "slow" and "S" shaped signs are mainly used to remind drivers of traffic congestion ahead or situations requiring reduced speed.
Guidance strips are used to display road conditions, such as green indicating smooth traffic flow and red indicating congestion.
Distance markers are used to display the distance to important locations or traffic nodes ahead.
Direction indicators are used to indicate the direction of travel for drivers.
Text information can be used to publish important traffic information, such as road conditions, construction information, and accident information.
III. Font and Color
Traffic guidance displays also have strict regulations regarding font and color. The font should be a prescribed font, with Chinese characters no smaller than 36 points and English characters no smaller than 20 points, to ensure that drivers can clearly see the text on the screen from a certain distance. In terms of color, the display should use high-contrast color combinations to improve the visibility of the information. For example, common color combinations include black text on a yellow background, or white text on a blue background.
IV. Installation Location and Angle
The installation location and angle of traffic guidance displays are also very important. Generally, the displays should be installed in appropriate locations on the road, such as intersections, highway entrances and exits, and bridges, to provide drivers with timely traffic information. In terms of installation angle, the display should be at a suitable angle to the driver's line of sight to ensure that drivers can clearly see the information on the screen.
V. Maintenance and Upkeep
Maintenance and upkeep of traffic guidance displays are also very important. Regular inspection and maintenance can ensure the proper functioning of traffic guidance displays and extend their service life. For example, regular cleaning removes dust and stains from the screen, maintaining its clarity; regular checks of the circuitry and power supply ensure the stable operation of the display and prevent malfunctions. Furthermore, if the traffic guidance display malfunctions or displays inaccurate information, it should be repaired or replaced promptly to avoid negative impacts on traffic.
In general, the national standards for traffic guidance displays are very strict, covering aspects such as specifications and dimensions, display content, font color, installation location and angle, and maintenance. These standards ensure that traffic guidance displays effectively provide drivers with accurate and timely traffic information, improve road efficiency, and alleviate traffic congestion.
