Street light in the context of "Point source pollution"

⭐ In the context of point source pollution, street lights are considered a contributor to which type of environmental issue?

Ad spacer

⭐ Core Definition: Street light

A street light, light pole, lamp pole, lamppost, streetlamp, light standard, or lamp standard is a raised source of light on the edge of a road or path. Similar lights may be found on a railway platform. When urban electric power distribution became ubiquitous in developed countries in the 20th century, lights for urban streets followed, or sometimes led.

Many lamps have light-sensitive photocells or astro clocks that activate the lamp automatically when needed, at times when there is reduced ambient light compared to daytime, such as at dusk, dawn, or under exceptional cloud cover. This function in older lighting systems could be performed with the aid of a solar dial.

↓ Menu

>>>PUT SHARE BUTTONS HERE<<<

👉 Street light in the context of Point source pollution

A point source of pollution is a single identifiable source of air, water, thermal, noise or light pollution. A point source has negligible extent, distinguishing it from other pollution source geometrics (such as nonpoint source or area source). The sources are called point sources because in mathematical modeling, they can be approximated as a mathematical point to simplify analysis. Pollution point sources are identical to other physics, engineering, optics, and chemistry point sources and include:

↓ Explore More Topics
In this Dossier

Street light in the context of Street

A street is a public thoroughfare in a city, town or village, typically lined with buildings on one or both sides. Streets often include pavements (sidewalks), pedestrian crossings, and sometimes amenities like streetlights or benches. A street can be as simple as a level patch of dirt, but is more often paved with a hard, durable surface such as tarmac, concrete, cobblestone or brick. It can be designed for both social activity and movement.

Originally, the word street simply meant a paved road (Latin: via strata). The word street is still sometimes used informally as a synonym for road, for example in connection with the ancient Watling Street, but city residents and urban planners draw a significant modern distinction: a road's main function is transportation, while streets facilitate public interaction. Examples of streets include pedestrian streets, alleys, and city-centre streets too crowded for motor vehicles to pass. Conversely, highways and motorways are types of roads, but few would refer to them as streets.

↑ Return to Menu

Street light in the context of Utility pole

A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and street lights while depending on its application. They are used for two different types of power lines: sub transmission lines, which carry higher voltage power between substations, and distribution lines, which distribute lower voltage power to customers.

Electrical wires and cables are routed overhead on utility poles as an inexpensive way to keep them insulated from the ground and out of the way of people and vehicles. Utility poles are usually made out of wood, aluminum alloy, metal, concrete, or composites like fiberglass. A Stobie pole is a multi-purpose pole made of two steel joists held apart by a slab of concrete in the middle, generally found in South Australia.

↑ Return to Menu

Street light in the context of Curb extension

A curb extension (or also neckdown, kerb extension, bulb-out, bump-out, kerb build-out, nib, elephant ear, curb bulge, curb bulb, or blister) is a traffic calming measure which widens the sidewalk for a short distance. This reduces the crossing distance and allows pedestrians and drivers to see each other when parked vehicles would otherwise block visibility. The practice of banning car parking near intersections (with or without a curb extension) is referred to as daylighting the intersection.

A curb extension is formed by an angled narrowing of the roadway and a widening of the sidewalk. This is often accompanied by an area of enhanced restrictions (such as a "no stopping" or "no parking" zone) and the appropriate visual reinforcement. This is achieved using painted road markings (e.g. lines, coloured areas, or chevrons), barriers, bollards, or the addition of pavement or street furniture (e.g. planters, street lights, or benches).

↑ Return to Menu