What is a Turbo Roundabout?

To better understand this new version of a roundabout lets define what a roundabout is first.

What is a Roundabout?

A roundabout is a circular intersection where entering traffic yields to vehicles already circulating counter-clockwise around a center island. Key features include:

Yield control for entering traffic
Counterclockwise circulation
Deflection of entering traffic
Low speeds (typically 15-25 mph)

Take that into consideration and consider the following..

So what is a Turbo-Roundabout?

Consider the definition of a roundabout and then consider that no lane changing is involved in the turbo-roundabout, no need to yield to traffic on more than two lanes, and low driving speed is reinforced by raised lane dividers.

How Does a Turbo Roundabout Work?

In a turbo roundabout, entering vehicles are directed into specific lanes that spiral outward. This design enables drivers to choose their desired exit lane before entering the roundabout, reducing the need for lane changes once inside. The lanes are typically marked with clear signage and road markings, guiding drivers throughout the approach and entry phases.

What Are the Benefits of Turbo Roundabouts?

Improved Traffic Flow: By directing vehicles into designated lanes, turbo roundabouts can handle higher traffic volumes compared to traditional roundabouts. This design reduces delays and congestion, especially during peak hours.
Enhanced Safety: The structure of turbo roundabouts minimizes conflict points between vehicles, lowering the likelihood of accidents. The clear lane markings and signage also help drivers navigate the roundabout more confidently.
Pedestrian and Cyclist Considerations: Turbo roundabouts often include dedicated lanes for pedestrians and cyclists, enhancing safety for all road users. This design fosters a more inclusive environment, encouraging sustainable transportation options.

Where Are Turbo Roundabouts Commonly Found?

Turbo roundabouts have gained popularity in several countries, particularly in Europe. The Netherlands, for example, has successfully implemented turbo roundabouts in various cities, showcasing their effectiveness in improving traffic management. Other countries, such as Canada and Australia, are beginning to adopt this innovative design as well.

Turbo roundabouts represent a significant advancement in roundabout design, offering improved traffic flow and safety for drivers, pedestrians, and cyclists. By adopting this innovative approach, cities can enhance their transportation networks, reduce congestion, and create safer environments for all road users.