The purpose of Side marker lights
is to enable a driver to see another vehicle that is approaching at an
angle at night (or is standing still with its side facing the driver)
and to see it early enough that the driver can stop in time to prevent a
nighttime angle collision or,at least,slow down or take evasive action
to reduce the severity of the collision.
History:The most notable change in motor vehicle lighting system is during the period 1965-75.In the US,amber front and red rear side marker lamps and retroreflectors are required.The law initially required lights or retroreflectors on vehicles made after 1 January 1968.Before that year,most vehicles did not have any illumination visible from the side.
Functions: These devices make the vehicle's presence,position and direction of travel clearly visible from oblique angles.The lights are wired so as to illuminate whenever the vehicles' parking and taillamps are on,including when the headlamps are being used.Front amber side markers in the United States may be wired so as to flash in synchronous phase or opposite-phase with the turn signals,but not mandatory to flash.
Side markers are permitted but not mandatory on cars and light passenger vehicles outside the US and Canada.If installed,they are should be brighter and visible through a larger horizontal angle than US side markers,may flash only in synchronous phase with the turn signals (but are not mandatory to flash),and they must be amber at the front and rear,except rear side markers may be red if they are grouped,combined,or reciprocally incorporated with another rear lighting function that is required to be red.
History:The most notable change in motor vehicle lighting system is during the period 1965-75.In the US,amber front and red rear side marker lamps and retroreflectors are required.The law initially required lights or retroreflectors on vehicles made after 1 January 1968.Before that year,most vehicles did not have any illumination visible from the side.
CAR SIDE MARKER LIGHT
Functions: These devices make the vehicle's presence,position and direction of travel clearly visible from oblique angles.The lights are wired so as to illuminate whenever the vehicles' parking and taillamps are on,including when the headlamps are being used.Front amber side markers in the United States may be wired so as to flash in synchronous phase or opposite-phase with the turn signals,but not mandatory to flash.
Side markers are permitted but not mandatory on cars and light passenger vehicles outside the US and Canada.If installed,they are should be brighter and visible through a larger horizontal angle than US side markers,may flash only in synchronous phase with the turn signals (but are not mandatory to flash),and they must be amber at the front and rear,except rear side markers may be red if they are grouped,combined,or reciprocally incorporated with another rear lighting function that is required to be red.
SIDE MARKER LIGHT FIXTURES
According
to the analysis of U.S.A.'s “Federal Motor Vehicle Safety” Agency,most
important conclusion is that side marker lamps are effective in
preventing nonfatal accidents and injuries--close to 100,000 of each per
year. Usually most fatal nighttime angle collisions involve one of the
vehicles traveling at high speed or both vehicles traveling at similar
speeds. In the first case, by the time that the high-speed driver sees
the other vehicle's side markers,there is no time to stop or
substantially slow down,in the second case,each driver can see the other
vehicle's headlamps more easily than the side marker lamps.
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