Of course, police lights and sirens may come in different forms and shapes in many countries around the world, sometimes because of the technology law enforcement agencies use or maybe because of the legislation.
For example, some countries use blue and red as the two main colors for the lights mounted on police cars, while others rely on blue to signal an emergency situation. In Asia on the other hand, the predominant color is red.
While most of the countries have already adopted the well-known lightbars, there are some states around the world that still use the old-fashioned beacon, and you'll see on the next page why. Although it's pretty clear that a lightbar is a lot more effective that its traditional predecessor...
Now, it's pretty obvious that police lights and sirens are the two main things that help police officers set themselves apart from the crowd and thus let them to their job. Once upon a time, however, these two harmless “weapons” were a tad less effective, but only because the technology behind them was a lot different. So let's open the history book and see the way they improved as the time passed by.