Material for making traffic signs
(1) highway traffic signs shall be made of reflective films or other retroreflective materials according to the requirements of the current highway traffic sign reflective film (GB/T 18833).(2) traffic sign plate adopts the reflective film material, highway, a highway should adopt one or two grade reflective film, two or three road traffic signs should adopt three or four grade reflective film, four roads should adopt the four or five grade reflective film.
(3) the door frame, cantilever type hanging type traffic sign, road traffic sign side should adopt high grade reflective film.(4) when illumination uniformity and condition permit, illumination or light emitting diode can be used to increase the recognition effect of important signs.
79 rule.(b) application and selection of reflective materials1) the road signs at all levels should be made of reflective materials in principle.2) highway / highway and urban trunk road traffic signs should adopt 1 to three reflective film; two or three grade highway and general city road traffic signs should use more than four reflective film. The four or five stage reflector film can be used on grade four highways and other roads with small traffic volume.3) highway, highway, urban expressway on the curve section signs, and urban areas of multiple crossings, it is better to use more than three reflective materials.4) portal highway, city expressway and the cantilever sign for roadside sign reflecting effect quite, should choose the road side marker used for high grade reflective film of reflective material, or the door frame and a cantilever sign marks on the character to the reflector, to improve the visibility of the night. Lighting signs may also be used on important sections of the condition.(c) color specification and reference color of traffic signs.
(a) the kinds and properties of reflective materialsThe reflective material used for marking faces can be classified into lens embedded type, sealed capsule type and micro prism type according to its structural difference. Its light reflection principle is: the light that shoots to the mark surface should turn back to the light source in the opposite direction of the incident light. Because of the difference of the sign position and the driving condition of the vehicle, the reflective material used for the marking surface should have excellent wide-angle and anti reflection performance. At different incident angle (the angle between the light ray and the surface normal signs of automobile front), different observation angles (automotive headlight reflector lamp light and sign back to the driver's eyes light, the angle between the) conditions, provisions for the sign of the retroreflection coefficient reflecting film should be consistent with JT/ T279.
