Effectiveness of the all-red clearance interval on intersection crashes
dc.contributor.author | O'Brien, Molly | |
dc.contributor.department | Department of Civil, Construction and Environmental Engineering | |
dc.date | 2020-07-17T07:21:39.000 | |
dc.date.accessioned | 2021-02-26T08:32:20Z | |
dc.date.available | 2021-02-26T08:32:20Z | |
dc.date.copyright | Wed Jan 01 00:00:00 UTC 2003 | |
dc.date.issued | 2003-01-01 | |
dc.description.abstract | <p>[Crashes at signalized intersections account for approximately 20% of all crashes both nationally and within the State of Minnesota. Several research efforts have suggested that the use of all-red clearance interval at signalized intersections may reduce intersection crashes, particularly those related to signal violations. However, other research has shown that an all-red interval does not result in a reduction in crash rate. This research also evaluated the reduction in crashes due to use of an all-red interval at intersections within the City of Minneapolis. A cross-section analysis using generalized linear mixed models with a Poisson error distribution and log link function and mixed linear models with transformed data were used to compare Minneapolis sites with and without the all-red clearance interval. Results of the analysis agree with the previous studies that indicate no effect. A before and after analysis was also conducted to evaluate both short-term reduction in crash rate lasting approximately one year after implementation of an all-red interval. The research also evaluated user costs in the form of increased delay due to reduction in capacity that would result from implementation of the all-red interval at the remaining Minneapolis intersections that currently do not use the interval. Although a short-term effect was noted, the temporary safety benefits may not outweigh the long-term reductions in capacity and should be considered before implementation. Additionally, although no statistically significant long-term benefit was demonstrated, research results do not provide guidance on elimination of the all-red clearance intervals at intersections where it is currently in use.]</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/rtd/19528/ | |
dc.identifier.articleid | 20527 | |
dc.identifier.contextkey | 18549555 | |
dc.identifier.doi | https://doi.org/10.31274/rtd-20200716-95 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | rtd/19528 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/96895 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/rtd/19528/O_Brien_ISU_2003_027.pdf|||Fri Jan 14 21:57:31 UTC 2022 | |
dc.subject.keywords | Civil and construction engineering | |
dc.subject.keywords | Civil engineering (Transportation engineering) | |
dc.subject.keywords | Transportation engineering | |
dc.title | Effectiveness of the all-red clearance interval on intersection crashes | |
dc.type | thesis | en_US |
dc.type.genre | thesis | en_US |
dspace.entity.type | Publication | |
relation.isOrgUnitOfPublication | 933e9c94-323c-4da9-9e8e-861692825f91 | |
thesis.degree.discipline | Civil Engineering (Transportation Engineering) | |
thesis.degree.level | thesis | |
thesis.degree.name | Master of Science |
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