Capacity Limits of Basic Turbo-Roundabouts

Kociánová, Andrea

doi:10.26552/com.c.2016.4.90-98

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Yet another issue is maximising the junction capacity in constrained areas by choosing the appropriate turbo roundabout type. The capacity traffic capacity issue problem has been dealt with by a number of researchers [2,13,[17][18][19][20][21][22][23]. They adopted various hypotheses and simulation models with the purpose of calibrating the already existing methods and adjusting them for various analyses, with the overall objective of demonstrating the superiority of turbo roundabouts over standard roundabouts in terms of traffic handling capacity.…”

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“…They adopted various hypotheses and simulation models with the purpose of calibrating the already existing methods and adjusting them for various analyses, with the overall objective of demonstrating the superiority of turbo roundabouts over standard roundabouts in terms of traffic handling capacity. Some authors point to the importance of full equilibrium traffic allocation among the approach legs and sometimes also the traffic lanes, e.g., [7,22,23]. Others considered varied traffic flow scenarios for turning movements and analysed the effect of this variation on the final capacity.…”

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Design Study for the Construction of Turbo Roundabouts under Constrained Site Conditions

Sołowczuk,

Majer

2023

Sustainability

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Turbo-roundabouts are one of the most frequently recommended road junction design options when it comes to increasing traffic capacity and traffic safety. This is in particular true of suburban areas, with dominant traffic flow on the main road and moderate traffic flow on the side road. Other intersections handling local traffic and considerably constricting the availability of space are usually located in the vicinity of such intersections. Another factor contributing to the limited availability of land for construction in these locations is the presence of surrounding residential housing. Then, choosing the suitable turbo-roundabout type becomes the main issue. The article presents a case study for the selection of a type of turbo roundabout under the conditions of considerably constricted land availability based on the analysis of the provision of a swept path for the chosen design vehicles. The article considers the standard egg-type turbo-roundabouts, “look-a-like” type turbo-roundabouts, non-standard “flattened” turbo-roundabouts and ellipse-based roundabouts, with non-standard geometries of the truck apron and central island. For each of the analysed roundabout types, setting-out methods were described in detail, allowing the designer to quickly select a type of roundabout suitable for the specific constrained site conditions. This article analyses the applicability of non-standard turbo roundabouts for three area types: LUDA low urbanisation degree area, BA built-up area and CDA highly commercially developed area along the side road, wherever standard roundabouts are not practicable due to constraints imposed by existing buildings, canals or any other obstacles found at the project site.

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Design Study for the Construction of Turbo Roundabouts under Constrained Site Conditions

Sołowczuk,

Majer

2023

Sustainability

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A comparative analysis of the performance of turbo roundabouts based on geometric characteristics and traffic scenarios

Dabiri

Aghayan

Hadadi

2020

Transportation Letters

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Design Study for the Construction of Turbo Roundabouts Under Constrained Site Conditions

Sołowczuk¹,

Majer²

2023

Preprint

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Turbo-roundabouts are one of the most frequently recommended road junction design options when it comes to increasing traffic capacity and traffic safety. This is in particular true of suburban areas, with dominant traffic flow on the main road and moderate traffic flow on the side road. Other intersections handling local traffic and considerably constricting the availability of space are usually located in the vicinity of such intersections. Another factor contributing to less availability of land for construction in these locations is the presence of surrounding residential housing. Then choosing the suitable turbo-roundabout type becomes the main issue. The article presents a case study for the selection of a type of turbo roundabout under the conditions of considerably constricted land availability, based on analyses of provision of swepth path for the chosen design vehicles. The article considers the typical Egg type turbo roundabouts, "flattened" turbo roundabouts and ellipse based roundabouts, with unconventional geometries of the truck apron and central island. For each of the analysed roundabout types setting out methods were described in detail, which enable designers to quickly select a type of roundabout suitable for specific constrained site conditions.

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Capacity Limits of Basic Turbo-Roundabouts

Cited by 4 publications

References 2 publications

Design Study for the Construction of Turbo Roundabouts under Constrained Site Conditions

Design Study for the Construction of Turbo Roundabouts under Constrained Site Conditions

A comparative analysis of the performance of turbo roundabouts based on geometric characteristics and traffic scenarios

Design Study for the Construction of Turbo Roundabouts Under Constrained Site Conditions

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