Have you ever been driving on a highway and noticed that almost every direction sign is green? Whether you're traveling across India or driving in many other countries, green signboards seem to be everywhere. Most people rarely think about it, but there is actually a fascinating combination of science, psychology, and road safety behind this simple design choice. The color of a highway sign is not selected randomly. Engineers and road safety experts spend years studying how drivers react to different colors, especially when traveling at high speeds. The goal is simple: help drivers receive information quickly and safely. The Challenge of Highway Driving Driving on a highway is very different from driving on city roads. Vehicles move much faster, and drivers have less time to read signs and make decisions. Imagine driving at 100 kilometers per hour. In just one second, your vehicle travels nearly 28 meters. If a sign is difficult to see or read, you could miss an important exit or d...