Traffic light | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Traffic_light


00:02:54 1 History
00:14:51 2 Types and placement of colors
00:15:28 2.1 Single aspects
00:16:40 2.2 Dual aspects
00:17:32 2.3 Three or more aspects &amp; positioning of aspects
00:18:17 2.4 Traffic signal cycles
00:19:27 2.5 Variations
00:21:09 2.6 Use of traffic signals in waterways, on railroads for rail traffic
00:22:02 3 Pedestrian and cyclist crossing lights
00:22:13 3.1 Australia and New Zealand
00:24:27 3.2 Asia
00:25:19 3.3 Europe
00:28:30 3.4 North American
00:30:25 3.5 Auditory and tactile signals for impaired people
00:32:25 4 Lights for public transport
00:35:49 4.1 Preemption and priority
00:38:31 5 Turning signals and rules
00:50:21 6 Lane control
00:53:29 7 Speed sign
00:53:56 8 Special provisions
00:55:57 9 Dummy lights
00:58:17 10 Technology
00:58:26 10.1 Optics and lighting
00:59:43 10.2 Programmable visibility signals
01:03:09 10.3 Conventional lighting systems
01:04:10 10.4 Light design
01:07:27 10.5 Technological advancements
01:08:24 10.6 Control and coordination
01:08:49 10.7 Mounting
01:13:40 11 Implementation
01:14:43 11.1 Small vehicle safety
01:15:58 11.2 Inoperative, defective, or non-cycling traffic lights
01:17:03 11.3 "Dead Red" laws for motorcycles
01:17:45 11.4 Traffic signal warrants
01:18:31 12 United States MUTCD
01:22:48 13 Legal implications
01:26:40 13.1 Red light running
01:29:47 13.1.1 Red light cameras
01:31:01 13.2 Confirmation lights
01:32:32 13.3 Light timing length
01:34:35 13.4 Turn on red
01:34:49 14 In other contexts
01:35:34 14.1 Racing
01:38:39 14.2 As a rating mechanism
01:39:07 15 Gallery
01:39:16 16 In Unicode
01:39:40 17 See also



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SUMMARY
=======
Traffic lights, also known as traffic signals, traffic lamps, traffic semaphore, signal lights, stop lights, robots (in South Africa and most of Africa), and traffic control signals (in technical parlance), are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic.
The world's first traffic light was short lived. It was a manually operated gas-lit signal installed in London in December 1868. It exploded less than a month after it was implemented, injuring its policeman operator. Traffic control started to seem necessary in the late 1890s and Earnest Sirrine from Chicago patented the first automated traffic control system in 1910. It used the words "STOP" and "PROCEED", although neither word lit up.Traffic lights alternate the right of way accorded to users by illuminating lamps or LEDs of standard colours (red, amber (yellow), and green) following a universal colour code. In the typical sequence of colour phases:

The green light allows traffic to proceed in the direction denoted, if it is safe to do so and there is room on the other side of the intersection.
The amber light warns that the signal is about to change to red.  In a number of European countries – among them the United Kingdom – a phase during which red and yellow are displayed together indicates that the signal is about to change to green. Actions required by drivers on a yellow light vary, with some jurisdictions requiring drivers to stop if it is safe to do so, and others allowing drivers to go through the intersection if safe to do so.
A flashing amber indication is a warning signal. In the United Kingdom, a flashing amber light is used only at pelican crossings, in place of the combined red–amber signal, and indicates that drivers may pass if no pedestrians are on the crossing.
The red signal prohibits any traffic from proceeding.
A flashing red indication is treated as a stop sign.In some countries traffic signals will go into a flashing mode if the conflict monitor detects a problem, such as a fault that tries to display green lights to conflicting tr ...