In recent years, with the increase in the number of accidents caused by vehicle collisions and the increased attention paid by the Ministry of Transportation to people’s driving safety on the road, many countries have begun to assist the guiding function of markings with the help of reflective raised pavement markers. Especially in remote mountainous areas, rural areas and other areas with limited lighting conditions, the road maintenance construction frequency is not high, so it is easy to stick raised pavement markers and flat road markers, there is a wider demand for applications.
What does Raised Pavement Marker mean?
Raised pavement marker, also known as road stud, is a raised marking block fixed on the road surface for marking, which can be used to mark the opposite lane division line, the same lane division line, the edge of the lane, etc. It can be used for marking the lane division line, the same lane division line, and the edge of the lane.
The biggest advantage of Raised Pavement Marker is that it has a small vertical height on the road surface, so when there is water on the road surface, it will not be easily blocked by the water, and will not affect the provision of good visual guidance for motorists.
Raised pavement markers are made of reflective sheets or glass spheres on their façade, reflecting the light source of the automobile to give drivers a more accurate sense of distance and direction.
Here is a detailed description of raised pavement markers from the Federal Highway Administration.
Basic Requirements for Raised Pavement Markers
1.Color and Reflection: The color of the raised pavement marker should be the same as the auxiliary marking color. Usually the color will be bright yellow or white, which can reflect the bright light source under the vehicle lights.
2.Setting Location: It can be set at pedestrian crossings, central isolation zones, the front of separated islands, etc. According to the actual situation of the road, it is set at the appropriate location to remind drivers to pay attention to driving safety.
3.Easy to recognize: Raised road markers have a steady and continuous brightness without flickering, and the markings are intended to provide orientation and trajectory references. They should be designed to be simple and clear to ensure that drivers can understand the road markings correctly and take the right action.
Spacing and Positioning of Raised Pavement Markers
Raised pavement markers play an important role in supplementing or even replacing road markings to provide a reference for vehicle positioning and trajectory. Raised Pavement Markers are installed in the following positions in relation to the markings:
1.Raised pavement marker is used in conjunction with marking line, choose active light-emitting type or directional reflective type, its color shall be unified with the line color, generally set in the empty middle of the marking line, with the interval of 6m~15m, or according to the actual situation can be appropriately encrypted.
Combined with the edge of the line and the center of the single solid line when used, raised road marking set in the side of the marking, the interval should be set with the lane demarcation line set the same interval, set the example shown in the figure below:
2.Raised Pavement Marker is used in conjunction with road entrance/exit ramp marking, diversion marking, road width gradient marking, etc. It should be arranged according to the actual marking, so that its outline is clear and distinct, an example is shown in the following figure:
3.When the raised road markers are arranged separately for lane demarcation, the spacing of the arrangement is 1~2M, and the arrangement can also be appropriately encrypted according to the actual road conditions.
The color of the raised pavement marker is unified with the performance color to strengthen the anti-skid performance of the raised pavement marker surface. Examples are shown in the figure below:
4.When Raised Pavement Marker is arranged for deceleration marking, the recommended spacing is 3.~50cm, and its color is unified with the performance color to strengthen the anti-skid performance of the surface of Raised Pavement Marker.
結論：
For vehicles traveling on the road, Raised Pavement Marker has the role of warning, guidance and orientation. The layout of Raised Pavement Marker is very important for road safety, and the reasonable layout of effective distance is very important for the restraint of vehicle and pedestrian traffic.
US standard for the installation of auxiliary and reinforced markers, see The Roadway Delineation Practices Handbook.
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