IUT ITE Student Chapter

Roundabouts vs. Traffic Signals: Which Wins?
At first glance, a roundabout might seem like a simple circle. But transportation engineers know it's one of the most effective tools for reducing crashes and improving traffic flow at intersections. Studies consistently show that roundabouts reduce fatal crashes by up to 90% and injury crashes by 75% compared to traditional signalized intersections.
How? At a roundabout, all vehicles move in the same direction and at lower speeds, eliminating the dangerous head-on and right-angle collisions that commonly occur at signal-controlled crossings. There's no temptation to run a red light because there is
NO RED LIGHT!
Beyond safety, roundabouts offer significant operational benefits. They never lose power, require no signal timing adjustments, and handle traffic continuously without stopping entire streams of vehicles. The ITE has been a strong advocate for roundabout adoption, particularly at low to medium volume intersections in urban and suburban areas.
Countries like the UK, France, and Australia have embraced roundabouts for decades. The United States now has over 9,000 modern roundabouts, a number that keeps growing as engineers and planners recognize their superiority over conventional signals.