Gap-accepteance parameters for roundabouts: a systematic review
The critical and follow-up headways are the two gap-acceptance parameters which explain the traffic interaction of a minor street vehicle when enters the roundabout, merging into or crossing one or more circulating (major) streams. Several studies and researches provide measurements of critical and follow-up headways from real data at roundabouts. The objective of our research is to synthesize the data from the series of selected studies to interpret variation across the studies. In order to match the research goal, a systematic literature review on estimations of critical and follow-up headways at roundabouts was undertaken. Since several studies and researches developed worldwide were examined, we were able to note that the effect size varied from study to study. Thus the meta-analysis of effect sizes was performed as part of the literature review through the random-effects model. After discussing the assumptions of this model, the dispersion in effects across studies was assessed and the summary effect for each of the parameters under examination was computed. Calculations were made both for single-lane roundabouts and double-lane roundabouts, as well as for turbo roundabouts. Compared to the results of individual studies, the single (quantitative) meta-analytic estimate provides an accurate and reliable synthesis on the specific issue here addressed, and gives, with greater power of the individual reviewed studies, a comprehensive measure for the parameters of interest.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/18668887
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Supplemental Notes:
- © 2015 Orazio Giuffrè et al. The contents of this paper reflect the views of the author[s] and do not necessarily reflect the official views or policies of the Transportation Research Board or the National Academy of Sciences.
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Authors:
- Giuffrè, Orazio
- Granà, Anna
- Tumminello, Maria Luisa
- Publication Date: 2016-3
Language
- English
Media Info
- Media Type: Digital/other
- Features: References; Tables;
- Pagination: 20p
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Serial:
- European Transport Research Review
- Volume: 8
- Issue Number: 1
- Publisher: Springer Publishing
- ISSN: 1866-8887
- EISSN: 1867-0717
- Serial URL: http://link.springer.com/journal/12544
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Publication flags:
Open Access (libre)
Subject/Index Terms
- TRT Terms: Gap acceptance; Headways; Literature reviews; Roundabouts; Traffic control; Traffic lanes
- Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning; I73: Traffic Control;
Filing Info
- Accession Number: 01583757
- Record Type: Publication
- Files: TRIS
- Created Date: Dec 23 2015 8:12AM