Bus Rapid Transit, Safety, and Roundabouts: Evaluation of design solutions for roundabouts with Bus Rapid Transit based on safety and level of service of all modes

The popularity of Bus Rapid Transit (BRT) has been growing rapidly over the past years, where more and more cities add BRT to their public transport systems. Roundabouts are also growing and are popular intersection designs because they are one of the safest types of intersections and improve traffic flow. It is, therefore, likely that in some...

Intersection Sight Distance Characteristics of Turbo Roundabouts

A turbo roundabout uses spiral circulatory roads for effectively counteracting the problems faced in modern multilane roundabouts. First developed in 1996, the turbo roundabout has an advantage over the conventional roundabout regarding capacity and safety. Turbo roundabouts are still in the developing phase in North America, but even in the...

Signalized Turbo Circle: Design and performance

Robustness of roundabout metering systems (RMS)

A simple explorative study shows that roundabouts are too small to be equipped with permanently operating traffic lights. The conclusion of a recent, more detailed study was not fundamentally different to this: at a small two-lane roundabout with four legs and with leg-by-leg control the shortest green time is 11 to 13 seconds, irrespective of...

Signalized Turbo Roundabouts: A Study into the Applicability of Traffic Signals on Turbo Roundabouts

Since the 1980s, the modern single-lane roundabout has been applied in the Dutch road network. The roundabout offered major safety benefits compared to the conventional signalized intersection, however, it also required more space. Influenced by society’s growing mobility, the capacity requirements to intersections increased. This quest for...

A comparison between the pleintje, priority intersection & roundabout: A comparison on cyclist traffic safety, traffic flow and environment

A comparison between the pleintje, priority intersection and roundabout based on the criteria cyclist traffic safety, traffic flow and environment.

Turborotonde en turboplein: Ontwerp, capaciteit en veiligheid

Historical Context The idea to install one-way circulatory traffic management on intersections was struck around 1900, both in the USA and Europe. The devisers regarded the principle of merging and weaving essential for the rotary system and, in practice, right of way had not yet been regulated unambiguously. This resulted in traffic circles...

Alternatieve aansluitingsvormen: Ontwikkeling van een keuzemodel voor de afweging van conventionele en onconventionele aansluitingsvormen op basis van literatuurstudie en microsimulatie

Interchanges are an important element in the road network of the Netherlands. This is where an exchange of traffic between highways and secondary roads is possible. However, not all interchanges are functioning optimally. The main problems that occur around interchanges concern the traffic flow and safety. This research wants to explore the...

Zusammenfassung des schweizerischen Kreiselhandbuchs; Summary of the swiss guide to roundabouts