You typically see black traffic lights in areas of the West Coast's sunbelt. Mostly, areas of California, Nevada, and Arizona.
The need to paint traffic lights in this part of the country black instead of yellow is due to lots of sunshine. The black paint absorbs the sunlight instead of reflecting it back into the eyes of the driver. This allows the driver to more easily see the light of the signal especially during sunrises and sunsets.
Usually, signals are painted yellow to attract attention from drivers; just as school buses are painted yellow. However, yellow is a highly reflective color and it just does not work in areas with lots of sunshine. Municipalities choose to experiment with different colors and styles of lights and lenses. Some have louvres so you can't see them from the side street.
to be sure that it is seen
Black
In London, black cabs are detected in the same way as any other vehicle, so they are given no preference at traffic lights.
where does the yellow wire with a black stripe on it connect for dimmer lights,panel lights,and gear shift lights,for a 2000 Mitsubishi galant
black and yellow
yellow and black
traffic, housekeeping, or aisle markings.
It means traffic can pass on either side of an obstruction such as an island.
(in the US) They usually have no special significance. Sometimes the color of the patrol units go all the way back into the department's history. Some places have ALWAYS had "black & whites" some have always been painted light blue, etc.
He painted in blue, yellow, red, white and sometimes green, blue and black
your ugly face
WRONG WAY signs posted at one endabsent yellow linesvehicles all pointing in one directionAdded: Rectangular sign containing a white arrow on a black background pointing in the direction of the traffic flow, with the words ONE WAY in black type centered within the white arrow.Also: A white arrow painted on the street surface pointing in the direction of the traffic flow.