The traffic lights were meant to allow right of way to the vehicular traffic alternately to different directions. The simple system gave a cue to the drivers when to stop and when to proceed. But in places where the traffic was heavy, the pedestrians found it difficult to cross. The crossing paths across road junctions were painted in black and white stripes for the pedestrians to walk. On this strip, called the Zebra Crossing, the vehicles had to stop to give right of way to the walkers. But where the pedestrians were numerous they had a time slot of their own with "Walk" / "Don't Walk" lights at pedestrian crossings.
There is a wide diversity of various LED lights currently available on the market. They come in different sizes and shapes and of course, they are used for many different purposes. LED lights are designed with some resistors and they can be used as high power lights for the most robust operations. The types of LED lights you can choose from range between 1W up to 3W wireless LED remote controllers, LEDs with resistor and wire, LED strips, LED sign boards and many more. Today you can see LED traffic signs are widely used in many countries including India, China, USA and others. Because these lights will not consume too much energy power, they are very economical and you can afford to use many of them for different uses. They are definitely better to use than the traditional bulbs because they will not heat as quickly as traditional bulbs. They will last a longer time for the same reason and thus they are a cost-effective option.
Best Features of Traffic Signals LED:
• 10 years of life
• Intensity can be controlled
• Operates in high temperatures
• Long Visibility
• 5 watts usage
• Powered using solar panels
• Low output degradation
• Even and constant light output
• Available in 300 mm &200 mm
Though LED’s have a higher purchase price, they save money in lifetime operating expenses. According to one study, the initial cost of a typical LED traffic signal ball was around $70 compared to an incandescent signal at $20. When energy use and maintenance costs were added, the total lifetime operating costs of LED lights were approximately one-third that of incandescent signals. Today mini traffic lights made of LED are in heavy use at small junctions of most of the country. The cost saving and environment saving aspects of LED have made them a prime choice for traffic lighting.