Traffic signaling emerged towards the end of the 19th century, with increasing vehicle traffic in cities. The first traffic signals were introduced in London in 1868 as a gas-powered system. This system was a manual approach where police officers took on the task of signaling; drivers and pedestrians acted according to the officers' directions.

In the 1920s, the first electric traffic signals came into use. This new system offered a safer and more effective arrangement operating with red and green lights. Electric signals significantly improved traffic flow, allowing vehicles and pedestrians to move more regularly.

Over time, traffic signaling technology developed, transitioning to automatic systems and today's intelligent signaling systems. This evolution has greatly changed the transportation dynamics and safety of cities. In future articles, we will continue to examine the social impacts of these developments and their current applications.