Flower roundabouts and double-lane roundabouts: a comparative performance analysis

• Autorzy: Giuffrè O. , Granà A. , Giuffrè T. , Marino R. , Marino S.

Identyfikatory

DOI

10.2478/ace-2014-0024

• Języki publikacji: EN

Abstrakty

EN

In the paper, a choice criterion between flower roundabouts and double-lane roundabouts is proposed, focusing on operational benefits that can derive from one scheme over the other, and outlining a general framework for benefi t-cost analysis. In order to assess operational benefits of innovative roundabouts over modern roundabouts, a comparative analysis was made. Capacity was estimated using gap-acceptance models. In detail, assuming the dichotomic shifted negative exponential distribution to model headways in circulating streams, the Hagring formula was adjusted to obtain entry capacity estimations at roundabout approaches where entering vehicles face one or two conflicting flows. Based on the control delay, the suitability domains and indifference areas were constructed. Thus, a sensitivity analysis to changes in traffic demand for operational benefits of flower roundabouts over double-lane roundabouts was carried out and discussed. At last, evidence for new installations and conversion of existing roundabouts can be found.

Słowa kluczowe

EN

double-lane roundabout; flower roundabout; entry capacity; delay

PL

rondo dwupasmowe; rondo kwiatowe; pojemność wjazdu; opóźnienie

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2014
• Tom: Vol. 60, nr 3
• Strony: 349--365
• Opis fizyczny: Bibliogr. 33 poz., il., tab.

Twórcy

autor

Giuffrè O.

• Department of Civil, Environmental, Aerospace, Materials Engineering, Università di Palermo, Palermo, Italy

autor

Granà A.

• Department of Civil, Environmental, Aerospace, Materials Engineering, Università di Palermo, Palermo, Italy

autor

Giuffrè T.

• Faculty of Engineering and Architecture, Università Kore di Enna, Enna, Italy

autor

Marino R.

• Department of Energy, Information Engineering and Mathematical Models, Università di Palermo, Palermo, Italy

autor

Marino S.

• Department of Civil, Environmental, Aerospace, Materials Engineering, Università di Palermo, Palermo, Italy

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