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In order to show compliance to FMVSS 108, the lens of each original equipment and replacement headlamp, daytime running lamp (DRL) and certain conspicuity reflectors must be marked with the symbol "DOT". [1]: S6.5, S8.2.1.3, Table III This symbol may also be applied to compliant signal lighting devices, but is not mandatory.
In 1965 San Diego Police Motorcycle Officer Kenneth Grant Maine, improved upon and applied for a patent on the white epoxy-resin reflective raised pavement marker. He then submitted it to the California Bureau of Highways, later called the California Department of Transportation and now known as Caltrans.
A round, white Botts' dot, surrounded by excess adhesive Botts' dots on Interstate 280, near the Sand Hill Road exit, Menlo Park, California. Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective ceramic [1] raised pavement markers.
A rear reflector on a bicycle Reflecting device on horse. A safety reflector is a retroreflector intended for pedestrians, runners, motorized and non-motorized vehicles. A safety reflector is similar to reflective stripes that can be found on safety vests and clothing worn by road workers and rescue workers. They are sometimes erroneously ...
A key feature of the cat's eye is the flexible rubber dome which is occasionally deformed by the passage of traffic. A fixed rubber wiper cleans the surface of the reflectors as they sink below the surface of the road [2] (the base tends to hold water after a shower of rain, making this process even more efficient). The rubber dome is protected ...
The dot remains on the target even though the viewer's head is moved side to side. A reflector sight or reflex sight is an optical sight that allows the user to look through a partially reflecting glass element and see an aiming point or some image (helping to aim the device, to which the sight is attached, on the target) superimposed on the ...
Clear or white reflectors are the most efficient, and appear brighter than other colors. The surface area of the reflector is proportional to the R I value, which increases as the reflective surface increases. [1] The R I value is also a function of the spatial geometry between the observer, light source, and reflector. Figures 1 and 2 show the ...
A motorcycle headlamp modulator (or simply headlamp modulator) is an accessory device that oscillates the intensity of a motorcycle headlamp at 240 ±40 cycles per minute (~4 Hz) [1] between approximately 20% and 100% of full intensity. The headlight operates at full intensity 50-70% of the time. [2]