Benefits

High volumes of traffic can quickly saturate a single-lane roundabout. While a multi-lane roundabout solves capacity challenges in areas where traffic volume is important, it also compromises safety! The turbo roundabout addresses both the capacity and safety challenges thanks to the characteristics listed below:

Limited Weaving Movements

A turbo-roundabout doesn’t allow drivers to change lanes on the circulatory area, but forces them to choose the entry lane according to their exit direction. Limited weaving maneuvers results in a safety increase on the roundabout.

Research and experiments show that traffic accidents are reduced by 72% on turbo-roundabouts compared to multi-lane roundabouts.

Increased Capacity

Maintaining a low driving speed on the roundabout doesn’t necessarily lower its capacity. By ensuring a low driving speed as well as a safe and sustainable traffic flow, the capacity of a turbo-roundabout remains as efficient as of a multi-lane roundabout.

Fewer Conflict Points

By introducing nested spiral lanes, disabling lane changes on the circulatory area and by forcing vehicles to exit, – thanks to lane markings or raised lane dividers – the number of conflict points on a turbo-roundabout is clearly reduced. Therefore, traffic accidents as less likely to take place on a turbo than on a multi-lane roundabout

Lower Vehicle Speed

With various tools – raised or non-raised lane dividers, simple lane markings, – a turbo-roundabout is channeling vehicle movements in a narrower area than a regular multi-lane roundabout. In other words, vehicles’ driving speed on the circulatory lane is lowered to guarantee maximum safety. Various research and experiments show that traffic accidents are reduced by 72% on turbo-roundabouts compared to multi-lane roundabouts, which makes turbo-roundabouts nearly as safe as single lane roundabouts.