NextGen Pakistan on Instagram: "A single tap of the brakes can ripple through traffic like a shockwave. 🧠🚦 In this controlled Japanese experiment, cars drove in a continuous loop with no crashes, no lane closures, and no bottlenecks. Yet congestion still formed. The reason is simple physics and human reaction time. When one driver slows even slightly, the car behind brakes a little harder, and the effect compounds. That delay travels backward through traffic at roughly 20 km per hour, eventual