28/08/2025
The transformation began in the mid-1990s when city planners sought safer and more efficient alternatives to traditional intersections. Roundabouts, unlike stoplights, force vehicles to slow down while keeping traffic flowing continuously. This reduces the likelihood of severe collisions such as right-angle or head-on crashes, which are more common at signalized intersections.
Beyond safety, roundabouts have significant economic and environmental benefits. Without the need for costly traffic signal equipment and electricity to power them, maintenance expenses are lower over time. Continuous traffic flow also means less idling, which translates into reduced fuel consumption and lower greenhouse gas emissions, supporting broader sustainability goals.
Carmel’s network of roundabouts has become one of the largest in the United States, attracting attention from transportation experts worldwide. Studies conducted on the city’s intersections show consistent improvements in traffic efficiency, safety outcomes, and environmental performance compared to traditional road designs.
This large-scale adoption of roundabouts demonstrates how urban infrastructure changes can reshape everyday travel. By prioritizing safety and efficiency, Carmel has become a model for other cities considering alternatives to conventional traffic control systems.
