A turbo-roundabout is a relatively new type of roundabout, which provides a spiraling flow of traffic, requiring drivers to choose their direction before entering the roundabout. Professor L.G.H. Fortuijn first introduced it the late 1990's as a safer and more efficient alternative to the standard multi-lane roundabouts.

Learn about the flexibility and unique features that make TORUS the most sophisticated and dynamic roundabout design software. As turbo-roundabouts spread throughout the world as an alternative to standard multi-lane roundabouts, new design software will be needed to handle the growing demand.

turbo roundabouts are adaptable to the U.S. context, providing an effective roundabout solution for higher-volume intersections. The goal of this document is to synthesize existing published resources (e.g., reports, papers, presentations, videos, and tools) on

1 day ago · While typical roundabouts allow drivers to change lanes within the roundabout to reach their desired exit, turbo roundabouts have dedicated line that direct traffic to specific lanes. “The design for turbo roundabouts is particularly beneficial in high-traffic areas, especially where industrial and commuter traffic intersect.

describe the characteristics of turbo roundabouts, highlighting the design and traffic control features, operational capabilities, and potential safety benefits of these roundabout alternatives. 1 A 2 x 2 roundabout is characterized by two entry lanes approaching two circulating lanes.

Turbo roundabouts are multi-lane roundabouts with spiral road markings and with entry and circulating lanes separated by raised lane-dividers. The Turbo Roundabout was introduced in the Netherlands to solve capacity and safety issues that often occur in …

The turbo roundabout directs vehicles to approach more radially, significantly reducing the distance a vehicle must clear when entering. In some cases, the turbo roundabout has been shown to decrease crashes by 50% compared to traditional roundabouts.

Jan 9, 2024 · Research suggests turbo roundabouts lead to fewer conflicts (down 50% compared to two lane alternatives) and increased capacity (45% more traffic can be handled on average). Moreover, they serve to decrease congestion and vehicle speeds alike.

Like traditional roundabouts, turbo roundabouts are one-way circular intersections where vehicles move counterclockwise around a central island. There are no traffic signals or stop signs so vehicles can flow continuously through the intersection.

The turbo roundabout design is given as an example [102] in the federal Manual on Uniform Traffic Control Devices. Sub-sea roundabouts. A new development is the roundabout below the seabed, in locations where multiple undersea traffic tunnels join.