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A warning triangle is, together with warning lights, used in order to secure a traffic accident site. The legal rules in the individual states partly order a warning triangle to be brought in the vehicle (in Germany according to § 53a StVZO). The warning triangle consists of three reflective beams, similar to a cat's eye, and a stable foot.
Vienna Convention falling rocks sign (white triangle) These signs may be used to indicate the hazards of fallen or falling rocks on the road ahead. They are usually pictographs, but may also include wording, such as "falling rocks". In Italy the words may be "caduta sassi" or "caduta massi"; in France " chute de pierres"; in Mexico " derrumbe s".
Raised reflective markers, such as plastic, ceramic, or metal ones, include a lens or sheeting that enhances their visibility by retroreflecting automotive headlights, while glass road studs gather automotive headlights with a dome shape and reflect the lights with a reflective layer within.
11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).
Typically, Asian countries closely follow Europe in terms of road sign design, which means they are influenced by the Vienna Convention on Road Signs and Signals, though a number of countries' signage has been influenced from the Manual on Uniform Traffic Control Devices (MUTCD), for example Cambodia, Japan, Thailand, Myanmar, Sri Lanka ...
Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones . Later, signs with directional arms were introduced, for example the fingerposts in the United Kingdom and their wooden counterparts in Saxony .
Most warning signs are diamond-shaped and yellow or red-bordered triangular warning signs; some warning signs may be fluorescent yellow-green in order to draw extra attention. There are a few exceptions to this: Pentagonal signs are used in school zones in the United States, Liberia, and many areas in Canada.
28 in (711 mm), 10 lb (4.5 kg) – for freeway/highway applications (with reflective stripes) 36 in (914 mm), 10 lb (4.5 kg) – for freeway/highway applications (with reflective stripes) In New Zealand, they are compliant in two sizes for use on all roads; these are: 35 in (900mm), up to 16.5 lb (7 kg) - for all activities on all roads.