(1) The road traffic sign pole plate should be made of reflective film or other reflective materials that meet the current requirements of the "Highway Traffic Sign Reflective Film" (GB/T 18833).
(2) When traffic signs should use reflective films, first- and second-level reflective films should be used on highways and highways. 2. Highway traffic signs use third-level and fourth-level reflective films, and fourth-level and fifth-level reflective films are used for highway traffic signs.
(3) The products of traffic sign pole manufacturers include cantilever, cantilever and other suspended traffic signs, and it is advisable to use a reflective film higher than the roadside traffic signs.
(4) When uniformity and conditions allow, lighting lamps or light emitting diodes can be used to increase the visual recognition effect of the importance mark.
a) Types and properties of reflective materials
The reflective materials used to identify the surface can be divided into lens embedding type, sealing capsule type, microprism type and other varieties according to their structure. The principle of light reflection is: the light emitted to the marking surface must be reflected back to the light source in the opposite direction of the incident light. Due to the different sign position and vehicle driving conditions, the reflective materials used on the sign surface should have excellent wide-angle and retroreflective properties. . Under different incident angles (the angle between the car headlight light and the normal of the marking surface) and different observation angles (the angle between the car headlight light and the light reflected back to the driver), the retroreflection coefficient value of the reflective film used for the marking surface shall comply with the provisions of JT/T279.
Application and selection of reflective materials
(1) In principle, the sign surface should be made of reflective materials.
(2) The traffic signs on highways, highways and urban main roads should use reflective films; 2. The traffic signs on highways and general urban roads should use reflective films of level 4 or above. 4. The fifth-level reflective film can be used on roads with low traffic such as the fourth-level highway.
(3) The above signs should be used for curve sections at intersections of expressways, expressways, urban expressways, and urban areas. Reflective material.
(4) Gantry signs and cantilever signs for expressways and urban expressways. In order to obtain the same reflective effect as roadside signs, it is advisable to choose a reflective film with a higher grade than the reflective film used for roadside signs. The lighting materials, or characters on the gantry sign and cantilever sign are changed to reflectors for visible at night. Lighting signs can also be used in important road sections with conditions.
