On December 10th in the year 1868, the first light was placed into service. The bulky, primitive device employed colored lamps that were fueled by gas for use after dark, and semaphore arms. It required an operator to attend it at all times that it was in use. Twenty three days after that first traffic went into service, it exploded – injuring the police officer who was assigned to run the lights and signals. This unfortunate event brought into question the practicality of implementing traffic signal lights.

Despite the volatility, and ultimately disastrous results, of using the first traffic signal light, inventors and engineers pursued the idea. As more and more traffic amassed on streets and roadways, the use of stop signs and officers standing on boxes at became less and less practical – and more and more dangerous.

Sometime around 1912 the first electric traffic signal was put into use. These initial units only had red and green lights, however. In 1917 in Salt Lake City, Utah, a series of traffic lights were linked together, thus ‘connecting’ six sequential intersections. This system was operated manually with a single switch.

In 1922 Garrett A. Morgan made application for a patent on a traffic signal light of his own design. The patent was granted the following year. This started the myth that Morgan was the inventor of the traffic light.

Between the time the first were introduced, and the early 1960’s many improvements were made, and many experiments conducted. The biggest problem with to that point was simply that they were dependent on timers only. East- would get a green light for 3-minutes, and then a timer would trigger a green light for the north-south traffic – and so on. The lengths of time could be adjusted, but these settings frequently created problems with the flow of traffic.

In the early 1960’s traffic engineers started to implement “inductive loops” to control intersection traffic flow. The loops, which could detect vehicles in specific lanes at intersections controlled the lights’ timers. The inductive loops would switch the lights to accommodate the traffic at hand, based on the time of day. No more sitting at red traffic lights for 2-3-4 or 5 minutes - even if there was no cross-traffic present. Traffic engineers basked in a deluge of praise from drivers.

In the 1970’s technological advances in metallurgy, plastics, and rubber started changing the way vehicles were manufactured – and what they were being manufactured with. No longer was everything from the dashboard to the fenders made of high-iron content steels. It was in conjunction with these advances that the myths of tripping traffic lights began. Since then, it has gotten worse every year as more alloys, plastics, and rubber are used in the construction of vehicles.

It seemed logical that the amount of weight present at an intersection is what would trigger a green light. This is a myth. It also seemed logical that the mass present at an intersection would trigger a green light. This is also a myth. Since people were unable to make traffic lights trip by adding weight, or by having more mass to their vehicles, they started to seek other answers. The last most popular myth is that there is an invisible curtain that, when broken by a vehicle, triggers a green light. It is thought that the curtains only cover a portion of the lane, and if you do not violate the curtain, you don’t get the green light. This is also a myth.

Actually, inductive loop technology is very simple. An inductive loop is nothing but a very large, very weak electromagnet. The term ‘inductive loop’ refers to electromagnets used in industry to detect iron. They are commonly used in numerous industrial applications. They are inexpensive to make, install and maintain.

Inductive loops at traffic lights are created by burying large coils of thin copper wire slightly beneath the road’s surface. The wires are covered with either black tar or rubber. A small current runs through the wire, thus making it into an electromagnet. The loop is connected to a meter which measures changes inside the loop. Magnets react to iron – not plastic or rubber or aluminum. So when enough iron is present within the loop, the traffic light cycles to green.

The vehicles that have the greatest trouble tripping lights are motorcycles and mopeds, followed by small cars and trucks, and then raised 4×4s and SUVs. Drivers of these vehicles often sit undetected at traffic lights wasting fuel, getting rained on, their engines overheating, and their irritation growing.

To positively trigger your green lights, you can drag a bowling ball-sized piece of iron around on the ground – but that won’t work if it’s inside your trunk. That’s too far from the weak sensing field of the loop. In the trunk, you’ll need two or three large iron balls. OR you can install a Signal Sorcerer® traffic light changer http://signalsorcerer.com/.

Signal Sorcerer® traffic light changers use their own technology to make inductive loops detect your vehicle – no matter what size, weight, or mass it is. Simply install the Signal Sorcerer® under your vehicle, and the inductive loops that control traffic lights will detect your vehicle, and give you the green light!

Signal Sorcerer® requires no power, lasts a lifetime, is legal everywhere, installs in less than five minutes without any tools, and is completely guaranteed. Signal Sorcerer® traffic light changers have been in use around the world for years, and units are available for every application including police motorcycle divisions, security vehicles, fleet vehicles, and personal conveyances.

About the Author:

Eric Scribener is a 30-year veteran freelance writer and photographer currently on assignment for http://www.dotcomtucson.com/ - putting Tucson Arizona in the palm of your hand.

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You’ve likely heard one of those statements such as “If a pigeon lands on a statue in Trafalgar Square, and at the same time a tree falls in , then it will rain on .” Baffling, isn’t it? Well, such is the nature of chaos theory. But higher prices for fuel at the pump are absolutely causing more and more people to sit at that won’t change for them. It’s a very direct cause and effect issue – not at all chaos theory.

Unfortunately, people not being able to trigger traffic lights to cycle to green has the effect of causing more gasoline to be consumed/wasted. This raises the demand for fuel, which as we have seen, causes the prices to go up even further. It’s an unattractive loop, to be sure. And let’s not forget about the many other negative aspects of getting stuck at that won’t change such as irritation; excessive engine temperatures and overheating; frustration; additional green house gas emissions; excessive engine wear; carbon build-up, and so on.

Let’s take a look at how high gas prices are affecting traffic signals. When regular unleaded gas hit $3 per gallon, with spikes as high as $4 in places around the USA, people started buying smaller means of transportation. Motorcycles, mopeds, small cars, and small trucks, with their miserly fuel behaviors, became much more desirable, and much more common on the streets and highways. It’s a logical occurrence. If you own a vehicle that gets 15 , and you trade for one that gets just 18 miles per gallon, you stand to save hundreds of dollars a year on gas spending.

One of the reasons that smaller cars and trucks are so much more fuel efficient is that they use lightweight, high-tech alloys, plastics, and rubbers to construct them. There is no argument that new materials and construction techniques make today’s vehicles eminently better than those of the past – and certainly more fuel efficient. However, the lack of (1)iron in these modern marvels of transportation makes it a real problem to trigger traffic lights. It’s not the lower weight of these vehicles, it’s actually the lack of iron. This makes it easy to see why motorcyclists, bicyclists, and moped riders have always had difficulty when it comes to triggering green lights. But let me explain further…

Since early in the 1960’s, the overwhelming majority of the controlled traffic signals in the United States are regulated by very large, very weak electromagnets. Electromagnets that are used to sense iron, instead of lift it, are called “inductive loops.” These loops most often appear at controlled intersections as large rectangles (outlined in black) in the road.

Inductive loops, like all magnets, detect iron - not aluminum, rubber, plastic, weight, mass, titanium, etc. Small cars and trucks, as well as motorcycles and mopeds, rarely have enough iron close enough to the ground to cause the inductive loop to detect their presence at the intersection – ergo, the light does not trip. Now for the solution to the problem.

Each Signal Sorcerer® traffic light changer (available at www.signalsorcerer.com) generates and directs a very powerful field that causes the traffic signal controlling inductive loops to detect the vehicle it’s attached to, and initiate a signal cycle change. Signal Sorcerer® traffic light changers have been a must-have motorcycle and moped accessory around the world for years, but now that so many small cars and trucks are on the road, they are becoming the new ‘must-have’ accessory for four-wheeled vehicles.

Signal Sorcerer® traffic light changers install in about two minutes, and require no special tools. Everything needed comes with the each traffic light changer. No electricity, no wiring, no maintenance, a lifetime of service, legal everywhere, EPA compliant, DOT compliant, and the internationally famous Iron Horseman Technologies guarantee of your complete satisfaction.

(1) Iron: ferrite, chemical symbol Fe – used in the making of steels. Ferrite used to be a primary component of steels, but now, with newer, more efficient and stronger materials available, ferrite is rather rare.

Signal Sorcerer® is a registered trademark of Iron Horseman Technologies. Iron Horseman Technologies® is the registered trademark of Iron Horseman Technologies.

About the Author:

Eric Scribener is a 30-year veteran freelance writer and photographer currently on assignment for http://www.dotcomtucson.com/ - putting Tucson Arizona in the palm of your hand.

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Posted on 16-09-2006
Filed Under (Automotive) by Auto News

A is an electronic device used by motorists to determine whether their speed is being observed or not by a police officer. The objective of a radar detector is to protect the motorist from getting a speeding ticket from the officer who is using a .

were introduced in the early 1970’s. The term radar detector originated from technologies that were used earlier to detect speed.

Now the question arises, "What is radar?" Radar is a system used to measure the speed and location of any object. This system consists of two important parts - a transmitter and a receiver. The radio transmitter causes voltage fluctuation by oscillating an electric current at a predefined frequency. This oscillation of the electric field generates electromagnetic energy. This propagates in the air as . A transmitter consists of an amplifier and an antenna. While the former increases the power of electromagnetic energy, the latter transits it into the air.

The basic function of radar is to determine its distance from the destined object. For this function, the emits concerted to observe any echo. If any object comes in the way of the radio waves, then it can be easily detected by radar with the help of electromagnetic energy. Radio waves constantly travel in the air at the speed of light. The distance of the object from the radar is determined by observing the time taken by the radio waves to return.

For measuring the actual speed of any object, radar can be used with a fact called Doppler shift. When any moving object passes in front of the radar, its echo will reflect the signals of the radar. The time taken by the radio signals to return after striking the object, and the frequency with which they travel, gives the actual speed of that object. If an object is coming towards the radar, then the signals will come back in a shorter period of time. It will increase the frequency and tells the actual time in which an object will cross the radar. This process depends on how fast the frequency will change. Traffic police use radar in the form of a radar gun, which is either hand-held or vehicle mounted, to detect speeding vehicles.

A basic radar detector detects police radar with just a simple radio receiver. In contrast, detectors that are more sophisticated comprise of a basic receiver along with a radio transmitter. A jamming signal is produced via this transmitter. It blends the signal of the police radar gun with extra radio noise. Due to this, a perplexed echo signal is received by the police radar gun, and the exact speed-reading cannot be taken.

Light-sensitive panels are being used in modern detectors which detect the beams from police laser guns. Lidar is difficult to avoid due to its concentrated beam, so it is quite possible that by the time the detector is able to detect it, the vehicle is in the beam’s sight already. For that, speeders also use a laser jammer. It works much like a radar jammer.

In conclusion, there are several systems available to detect radar, but none of these systems is a sure shot way to get protected against speed detectors. However, one thing that can be done to avoid speeding tickets is to ’slow down’.

About the Author:

Article by Stefan Rockhaus. Visit http://www.buy-radar-detectors.info for more http://www.radar-detectors-now.info/sitemap.htm information. Find further resources at http://www.innovative-info.info

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