Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems
This study explored factors affecting traffic accidents in roadway segments with and without lighting systems using a random parameter negative binomial model. This study sought to make up for a shortcoming of the fixed parameter model that constrained the estimated parameters to be fixed across obs...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Journal of Advanced Transportation |
| Online Access: | http://dx.doi.org/10.1155/2017/4740532 |
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| _version_ | 1849395226229080064 |
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| author | Minho Park Dongmin Lee |
| author_facet | Minho Park Dongmin Lee |
| author_sort | Minho Park |
| collection | DOAJ |
| description | This study explored factors affecting traffic accidents in roadway segments with and without lighting systems using a random parameter negative binomial model. This study sought to make up for a shortcoming of the fixed parameter model that constrained the estimated parameters to be fixed across observations, by applying random parameters that can take into account unobserved heterogeneity. Three variables had a random parameter among nine significant variables in segments with lighting systems, while seven of the eleven significant variables in a segment without a lighting system had random parameters. The different influence of interstate highway geometrics on vehicle crashes with and without lighting systems found through this study considering unobserved heterogeneity may hopefully help reduce accident frequencies and consider installation of lighting systems on interstate highways in the future. |
| format | Article |
| id | doaj-art-adea45a6aaaf4fcf8f230b3bef90e2ec |
| institution | Kabale University |
| issn | 0197-6729 2042-3195 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Advanced Transportation |
| spelling | doaj-art-adea45a6aaaf4fcf8f230b3bef90e2ec2025-08-20T03:39:41ZengWileyJournal of Advanced Transportation0197-67292042-31952017-01-01201710.1155/2017/47405324740532Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting SystemsMinho Park0Dongmin Lee1Highway & Transportation Research Division, Korea Institute of Civil Engineering and Building Technology, 283 Daehwa-Dong, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 411-712, Republic of KoreaDepartment of Transportation Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 130-743, Republic of KoreaThis study explored factors affecting traffic accidents in roadway segments with and without lighting systems using a random parameter negative binomial model. This study sought to make up for a shortcoming of the fixed parameter model that constrained the estimated parameters to be fixed across observations, by applying random parameters that can take into account unobserved heterogeneity. Three variables had a random parameter among nine significant variables in segments with lighting systems, while seven of the eleven significant variables in a segment without a lighting system had random parameters. The different influence of interstate highway geometrics on vehicle crashes with and without lighting systems found through this study considering unobserved heterogeneity may hopefully help reduce accident frequencies and consider installation of lighting systems on interstate highways in the future.http://dx.doi.org/10.1155/2017/4740532 |
| spellingShingle | Minho Park Dongmin Lee Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems Journal of Advanced Transportation |
| title | Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems |
| title_full | Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems |
| title_fullStr | Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems |
| title_full_unstemmed | Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems |
| title_short | Development of Accident Frequency Models with Random Parameters on Interstate Roadway Segments with and without Lighting Systems |
| title_sort | development of accident frequency models with random parameters on interstate roadway segments with and without lighting systems |
| url | http://dx.doi.org/10.1155/2017/4740532 |
| work_keys_str_mv | AT minhopark developmentofaccidentfrequencymodelswithrandomparametersoninterstateroadwaysegmentswithandwithoutlightingsystems AT dongminlee developmentofaccidentfrequencymodelswithrandomparametersoninterstateroadwaysegmentswithandwithoutlightingsystems |