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Road stud

Table of contents

Road stud

Common road stud

Solar road stud

Active tunnel road stud

Intelligent wireless road stud

Frequent problems regarding installation

Installation method of road stud

Frequent problems regarding road stud

Road stud

Road studs are usually used for railways and highways. Road stud (hereby refers to highway stud), also called raised road marker, belongs to a sort of traffic safety facility. It is installed in the middle of lane lines or yellow double-line for, through its retro reflection, reminding drivers to drive their vehicles along with the lanes. The specification of road studs is 100mm*100mm*20mm generally, and the height is not more than 25mm. Different reflectors are used including reflective sheets, reflective beads, LEDs and reflective films etc. The epoxy resin installation method is adopted generally for installation of road studs. Road studs can be divided into different types:

As per materials:

1. cast aluminum road stud; 2. plastic road stud; 3. ceramic road stud; 4. glass bead road stud; 5. reflective bead road stud (21-bead and 43-bead, which can be used for cast aluminum or plastic road studs).

As per functions: 1. common road stud; 2. solar road stud; 3. active tunnel road stud; 4. wireless road stud.

As per numbers of reflective sides: single-side road stud and double-side road stud.

Common road stud

(The compressive resistance of common road stud shall be more than 160KN in accordance with the requirement of the Ministry of Communications). Generally, cast aluminum road stud, plastic road stud, ceramic road stud and glass bead road stud are classified as common road studs. The detailed introductions of road studs as per functions are as follows.

1. Cast aluminum road stud

Poor impact resistance of reflective sheet At present, the key point for raised road markers is that the impact resistance of reflectors is poor. Over 80% of the products have such problem. Casings of most reflectors are welded through ultrasonic method as the process requires and therefore shedding and cracks of reflective sheets are inevitable, and the reflection effect will be affected due to inleakage of rain water on rainy days. Testing method: An impact test shall be performed for reflectors of road studs. After the white sheet is drawn out, use a 1KG steel ball to impact the surface of a road stud reflector under free fall, then dip it for luminance check. The luminance does not decrease if no water is leaked into the reflector. Poor compressive resistance The compressive resistance of road studs shall be more than 16t in accordance with the requirement of the Ministry of Communications, however, the compressive resistance of most road studs can not meet this requirement. Quick attenuation of luminance of reflective sheet The reflective sides of road studs are liable to be worn out by tyres with sand grains of roads. As for reflective sheets of single plastic road studs, the luminance will drop 50% within three months due to poor wear resistance. The transparent anti-wear coating method can be adopted for surfaces of road studs if their reflection effect is poor.