Roundabouts would use less gas compared to stop signs or lights. A car is going to use the most fuel when it goes from stopped to moving. A roundabout will redu

Roundabouts would use less gas compared to stop signs or lights. A car is going to use the most fuel when it goes from stopped to moving. A roundabout will reduce the amount of cars that have to come to a complete stop, unlike a stop sign or light where stopping is mandatory.