The marking retroreflectance measuring instrument is a portable on-site measuring instrument. The equipment can simulate the brightness of road markings visible to the driver under the illumination of motor vehicle headlights at night. The measured parame
At present, my country's transportation industry is in a period of rapid development. Highway construction has developed rapidly. By 2000, my country’s total highway mileage had reached 1.25 million kilometers, and the passenger and freight volume undertaken by my country’s highways accounted for 88.7% and 99% of the country’s total transport volume, which is the foundation and foundation of my country’s national economic development. lifeline.
According to administrative levels, roads can be divided into six levels: national roads, provincial roads, county roads, township roads, village roads (referred to as national, provincial, township roads, and village roads) and special roads.
According to China's current "Highway Engineering Technical Standards" (JTGB01.2003), highways are divided into five levels: expressways, first-class highways, second-class highways, third-class highways, and fourth-class highways according to their tasks, functions, and adapted traffic volume. .
Road marking specifications:
According to the national standard of "Road Traffic Signs and Markings" (GB5768-1999), my country's current road traffic markings are divided into three categories: indicating markings, prohibiting markings and warning markings. It depends on the kind of marking.
The width of the indicating mark is 10-20cm, the width of the prohibition mark is generally not less than 20cm, and the width of the warning mark is 15cm.
Road traffic markings are mainly set on the road surface, subject to sun, rain, wind, snow and freezing, and subject to impact and abrasion of vehicles, so there are strict requirements on its performance. First, it requires a short drying time and simple operation to reduce traffic interference; secondly, it requires strong reflection, bright colors, and strong reflectivity, so that it has good visibility during the day and night; third, it should have skid resistance and abrasion resistance. To ensure driving safety and service life.
Road traffic sign standards:
Standard introduction: This part of GB 5768 specifies the general requirements for the classification, color, shape, character, size, and graphics of road traffic signs, as well as the requirements for design, manufacture, installation, and construction. This part is applicable to the production, detection and installation of various road traffic signs on highways, urban roads and places where social motor vehicles are allowed to pass although they are within the jurisdiction of the unit, squares, public parking lots and other places used for public passage. Traffic signs set up in places where other motor vehicles pass, parking lots, etc. can be implemented by reference.
Road traffic marking standards:
Standard introduction: This part of GB5768 specifies the general requirements for the classification, color, shape, character, graphics, and size of road traffic markings, as well as the requirements for design and installation. This section applies to the production and installation of traffic markings for highways, urban roads and places where social motor vehicles are allowed to pass although they are within the jurisdiction of the unit, including squares, public parking lots and other places used for public passage. The traffic markings set up in places where other motor vehicles pass, parking lots, etc. can be implemented by reference.
Traffic marking materials:
Markings can be divided into solvent-based paint markings, hot-melt paint markings, water-based paint markings, and two-component paint markings, pre-formed markings with markings. The materials used for traffic markings should have good durability and good visibility during the day and night.
The marking retroreflectance measuring instrument is a portable field measuring instrument. The equipment can simulate the brightness of road markings visible to the driver under the illumination of the headlights of motor vehicles at night. The measured parameter is the night light retroreflective coefficient, that is, the RL value. The unit is mcd·m-2·lx-1. Used to measure the retroreflective characteristics of road markings, suitable for laboratory environments, and can also be used for on-site measurement. It is a necessary instrument and equipment for road marking manufacturers, engineering construction, quality supervision, supervision and other units to measure the retroreflective performance of road markings.