Traffic lights: for safety and efficiency on our roads

A traffic light system is a critical component of any urban infrastructure. At intersections, pedestrian crossings and other traffic points, traffic is not only regulated but also significantly influenced. At Yunex Traffic, we develop traffic signal systems that actively optimize traffic flow, improve pedestrian and cyclist safety and save energy.

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A revolution in urban mobiliy

Every city needs state of the art traffic lights ' and this is why

Cities with more conventional and therefore outdated traffic signals face a number of problems today and in the future that significantly impair the efficiency, safety and environmental friendliness of their traffic network.

Inefficient traffic flow

Without dynamic traffic control, traffic management often depends on outdated, rigid timetables. This leads to unnecessary delays and congestion, especially during peak traffic times or unforeseen traffic increases. The lack of ability to respond to real-time data can significantly impede traffic flow and worsen urban mobility. Modern control units, such as our sX control unit, controls our traffic signal systems in such a way that allows us to react to traffic situations.

Environmental impact

Cities without modern traffic light systems have difficulties in effectively reducing their CO2 emissions. Conventional signaling systems often have a high energy consumption. Thanks to our 1-watt technology for traffic light systems, massive energy savings can be made as the signal heads are operated with one watt each.

Lack of road safety

Traditional traffic signal systems do not have the advanced monitoring and analysis capabilities that modern intelligent systems offer. This limits their ability to prioritize cyclists or pedestrians through green waves, reducing the safety of these road users. The latest models from Yunex Traffic have detection built into the housing, reducing the need for additional technology at intersections.

High operating and maintenance costs

Reliance on outdated technology can increase operating and maintenance costs for urban transportation systems. Conventional traffic signal systems require more frequent maintenance andreplacement of parts, leading to higher costs in the long run. New enclosures from Yunex Traffic allow for easier maintenance with doors that open on both sides. Without the energy efficiency of modern LED technology, electrical costs are also significantly higher.

Missed opportunities for modernization and integration

Cities without access to intelligent transport solutions are missing out on the opportunity to modernize and better integrate their transport systems. They cannot reap the benefits of a more connected and coordinated system that not only improves traffic flow but also provides data for further urban planning measures.

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I think your basic assumption that they are all the same now is wrong, or at least very locally biased. Where I'm from, there are plenty of different shapes in use. Most notable are the pedestrian lights:

However, there are many variations, even animating ones:

and ones with different count-downs:

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There are also special versions for bikes:

Then, of course, there are also the arrows-type lights, in use for cars:

To conclude: it is hardly the case that there are only circles in use these days.

From a great distance, like traffic lights are often viewed from, it is hard to discern shapes--especially square vs. circle.

Glare and flaring tend to reduce the light to a blur anyway (except for those have 20/20 vision and perfectly clear eyeballs viewing them through a clean windshield on a clear day). The color becomes the predominant signal--and therefore it is quantity of light that becomes important.

The above examples all cut down on the amount of light leaving the signal-- especially the "bicycle" and "pedestrian" shapes (which are appropriate for the slower-moving clientele they serve, but would blur into "dim green"/"dim red" for car drivers, especially in the rain.

As @Matt mentioned in a comment to the question, the 'green' traffic lights often have a strong blue component so that RG-colorblind people have a better chance of distinguishing them, the major argument against relying solely on color.

Position provides an additional reinforcement, and a top-down arrangement is clearer than a left-right (or is it right-left?) arrangement, which was the other notably confusing thing about shaped Canadian traffic lights.

I noticed that the shapes started disappearing when traffic lights were being retrofitted with LEDs. When they started doing that, they didn't simply put the LEDs inside the reflection cones behind the lenses as one might have expected, but instead put disc-shaped LED matrices on the outsides of the lenses. At least, that's what it kind of looked like.

If you watch for them, on some signal heads you can still see square hoods where the red lights were. Incidentally, they changed the standard of signal arrangement: where, before, the right and left arrows were on the outermost positions of the signal head, now it is always the red lights that are outermost, and the right and left arrows are usually adjacent to the green and/or yellow lights. This results in the arrow lights sometimes having square hoods. Some signal heads have all square hoods, as in the one pictured in the question.

Some LED traffic lights were made with the shapes, but, for some reason, even those are hard to find now. During a recent visit to Quebec, I saw exactly two shape-coded traffic lights. They used to be all over the place.

I liked having the shape coded lights because they were something slightly strange that you see only in (eastern) Canada, giving tourists the impression (even if only subliminally) that this isn't just an extremity of the U.S.

Sorry for the thread bump in case that's a big deal here.

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