Comparative analyse of the two new alternative types of roundabouts – turbo and flower roundabout

Tollazzi, Tomaž; Renčelj, Marko

doi:10.3846/bjrbe.2014.21

Cited by 21 publications

(20 citation statements)

References 6 publications

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“…The first turbo roundabouts were installed at the end of the 90's in The Netherlands; by the end of 2007 there were seventy turbo roundabouts [2], whilst at the end of 2013 there were more than two hundred turbo roundabouts in the Netherlands [3]. The idea was very rapidly (just over a few years) transposed into several European countries such as Slovenia [4] (Fig. 5), Germany [5], Denmark, and Czech Republic [6], as also Hungary, the FYR of Macedonia and also into the USA.…”

Section: Recent Alternative Types Of Roundaboutsmentioning

confidence: 99%

“…However, the circle lane has no lane marking. Large trucks and busses are forced to use the whole width of the circulatory roadway when making their way through the intersection [4]. Their outer diameter is from 40 to 60 m, circulatory carriageway width is from 8 to 10 m (and is without lane marking -to prevent drivers from overtaking), and it could be one-or two-lane entries, according to traffic volumes.…”

Section: Recent Alternative Types Of Roundaboutsmentioning

confidence: 99%

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Modern and alternative types of roundabouts – state of the art

Tollazzi

Renčelj

2014

The 9th International Conference "Environmental Engineering 2014"

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Over the recent decades, roundabouts have been increasingly used when building new at-grade intersections and up-grade junctions all over the world, and also when rebuilding existing intersections. Modern roundabouts exist in all European countries and mainly worldwide, so we can say that today modern roundabouts are a world phenomenon. No uniform guidelines exist in Europe for the geometric designing of roundabouts as specific circumstances (local customs, habits, traffic cultures...) differ from country to country. Certain solutions that are safe in one country could be dangerous in another. Consequently, most countries have their own guidelines for the geometric designs of roundabouts that are, as far as possible, adapted to their circumstances in these countries and are therefore more acceptable within their surroundings. Today, after many years of experience, there are different ideas about the "ideal roundabout", with some consensus on the crucial effect of rules how to negotiate intersections. There are several different types of roundabouts worldwide today, called the alternative types of roundabouts. Some of them are already in frequent use all over the world (hamburger, dumb-bell …), and some of them are recent and have only been implemented within certain countries (turbo roundabout, dog-bone…) or are still at the development phases (turbo-square, flower, target, with segregated left-turn slip lanes…). Both groups typically differ from the "standard" one-or two-lane roundabouts in one or more design elements, as their purposes for implementation are also specific. Therefore, it was decided that it would be useful to collate, in one article, some of the alternative types that are already in frequent use today in some countries and some of them that are "still coming".

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Section: Recent Alternative Types Of Roundaboutsmentioning

confidence: 99%

Section: Recent Alternative Types Of Roundaboutsmentioning

confidence: 99%

Modern and alternative types of roundabouts – state of the art

Tollazzi

Renčelj

2014

The 9th International Conference "Environmental Engineering 2014"

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“…Modern approaches, such as flower and turbo roundabouts present recent solutions that improve road safety and reduce number of collisions, but waiting time when traffic flow is above 1500 vehicles per hour increases more than five times when compared to 1000 vehicles per hour [5]. Increased capacity also increases pollutant emissions [6].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Intelligence in Roundabout Intersections Using Hierarchical Fuzzy Behavior Calculation of Vehicle Speed Profile

Bosankic¹,

Mehmedović

2016

MATEC Web Conf.

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Abstract. In this paper, a new fuzzy-behavior-based algorithm for roundabout intersection management is presented. The algorithm employs cooperative intelligence and includes intelligent vehicles and infrastructure to calculate speed profiles for different vehicles, in order to achieve more comfortable driving profiles, as well to reduce congestion and CO2 emissions. The algorithm uses adaptive spatio-temporal reservation technique and was tested in MATLAB/Simulink environment. The algorithm is designed to function in different scenarios with both cooperative and non-cooperative vehicles, as well as optional intersection infrastructure. Results have show that using the proposed algorithm different vehicle communication types can be successfully combined in order to increase traffic flow through roundabout intersections.

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“…Possible solutions include installation of traffic lights at a roundabout entry, which can decrease waiting times during increased traffic flow times [3], especially if it is optimized [4]. Modern approaches, such as flower and turbo roundabouts, present recent solutions that improve road safety and reduce number of collisions [5]. Increased capacity also increases pollutant emissions [6].…”

Section: Introductionmentioning

confidence: 99%

Autonomous Vehicle-to-Vehicle (V2V) Decision Making in Roundabout using Game Theory

Banjanović-Mehmedović¹,

Halilović²,

Bosankic³

et al. 2016

ijacsa

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Abstract-Roundabout intersections promote a continuous flow of traffic. Roundabouts entry move traffic through an intersection more quickly, and with less congestion on approaching roads. With the introduction of smart vehicles and cooperative decision-making, roundabout management shortens the waiting time and leads to a more efficient traffic without breaking the traffic laws and earning penalties. This paper proposes a novel approach of cooperative behavior strategy in conflict situations between the autonomous vehicles in roundabout using game theory. The game theory presents a strategic decision-making technique between independent agents -players. Each individual player tends to achieve best payoff, by analyzing possible actions of other players and their influence on game outcome. The Prisoner's Dilemma game strategy is selected as approach to autonomous vehicle-to-vehicle (V2V) decision making at roundabout test-bed, because the commonly known traffic laws dictate certain rules of vehicle's behavior at roundabout. It is shown that, by integrating non-zero-sum game theory in autonomous vehicle-to-vehicle (V2V) decision making capabilities, the roundabout entry problem can be solved efficiently with shortened waiting times for individual autonomous vehicles.

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Comparative analyse of the two new alternative types of roundabouts – turbo and flower roundabout

Cited by 21 publications

References 6 publications

Modern and alternative types of roundabouts – state of the art

Modern and alternative types of roundabouts – state of the art

Cooperative Intelligence in Roundabout Intersections Using Hierarchical Fuzzy Behavior Calculation of Vehicle Speed Profile

Autonomous Vehicle-to-Vehicle (V2V) Decision Making in Roundabout using Game Theory

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