Roundabout accident prediction model: random-parameter negative binomial approach
Roundabouts have been used widely on all road classes in the United Kingdom because they are considered safer than other types of intersections in general. The objective of this study was to examine geometric and traffic characteristics and their influences on the number of accidents. Data from each...
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| Format: | Article |
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National Academy of Sciences
2016
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| Online Access: | https://eprints.nottingham.ac.uk/37538/ |
| _version_ | 1848795480126914560 |
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| author | Kamla, Jwan Parry, Tony Dawson, Andrew |
| author_facet | Kamla, Jwan Parry, Tony Dawson, Andrew |
| author_sort | Kamla, Jwan |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Roundabouts have been used widely on all road classes in the United Kingdom because they are considered safer than other types of intersections in general. The objective of this study was to examine geometric and traffic characteristics and their influences on the number of accidents. Data from each of 70 roundabouts (with 284 approaches) included all recorded vehicle accidents as well as geometric and traffic characteristics for the entire roundabout, within circulatory lanes, and at roundabout approaches. Resulting estimates were compared with those from random-parameter and fixed-parameter negative binomial count data models. The random-parameter results provided better goodness of fit than the fixed-parameter results, and more variables were found to be significant. Significant variables that influenced the number of accidents were total approach traffic, truck percentage, entry width, inscribed circle diameter, number of lanes, and presence of traffic signals. |
| first_indexed | 2025-11-14T19:32:45Z |
| format | Article |
| id | nottingham-37538 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:32:45Z |
| publishDate | 2016 |
| publisher | National Academy of Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-375382020-05-04T17:58:27Z https://eprints.nottingham.ac.uk/37538/ Roundabout accident prediction model: random-parameter negative binomial approach Kamla, Jwan Parry, Tony Dawson, Andrew Roundabouts have been used widely on all road classes in the United Kingdom because they are considered safer than other types of intersections in general. The objective of this study was to examine geometric and traffic characteristics and their influences on the number of accidents. Data from each of 70 roundabouts (with 284 approaches) included all recorded vehicle accidents as well as geometric and traffic characteristics for the entire roundabout, within circulatory lanes, and at roundabout approaches. Resulting estimates were compared with those from random-parameter and fixed-parameter negative binomial count data models. The random-parameter results provided better goodness of fit than the fixed-parameter results, and more variables were found to be significant. Significant variables that influenced the number of accidents were total approach traffic, truck percentage, entry width, inscribed circle diameter, number of lanes, and presence of traffic signals. National Academy of Sciences 2016-08-01 Article PeerReviewed Kamla, Jwan, Parry, Tony and Dawson, Andrew (2016) Roundabout accident prediction model: random-parameter negative binomial approach. Transportation Research Record, 2585 . pp. 11-19. ISSN 2169-4052 Roundabout accidents random-parameters fixed-parameters http://trrjournalonline.trb.org/doi/10.3141/2585-02 doi:10.3141/2585-02 doi:10.3141/2585-02 |
| spellingShingle | Roundabout accidents random-parameters fixed-parameters Kamla, Jwan Parry, Tony Dawson, Andrew Roundabout accident prediction model: random-parameter negative binomial approach |
| title | Roundabout accident prediction model: random-parameter negative binomial approach |
| title_full | Roundabout accident prediction model: random-parameter negative binomial approach |
| title_fullStr | Roundabout accident prediction model: random-parameter negative binomial approach |
| title_full_unstemmed | Roundabout accident prediction model: random-parameter negative binomial approach |
| title_short | Roundabout accident prediction model: random-parameter negative binomial approach |
| title_sort | roundabout accident prediction model: random-parameter negative binomial approach |
| topic | Roundabout accidents random-parameters fixed-parameters |
| url | https://eprints.nottingham.ac.uk/37538/ https://eprints.nottingham.ac.uk/37538/ https://eprints.nottingham.ac.uk/37538/ |