Standard against nonstandard urban intersection nighttime traffic safety evaluation using cross-sectional method
| Autor: | Hamid Mirzahossein, Mohammad Reza Eskandari, Hamid Reza Behnood, Abolfazl Khishdari |
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| Rok vydání: | 2021 |
| Předmět: |
Measure (data warehouse)
Environmental Engineering Cross-sectional study Omnibus test Negative binomial distribution Crash Building and Construction Expected value Geotechnical Engineering and Engineering Geology Pearson product-moment correlation coefficient symbols.namesake Statistics symbols Engineering (miscellaneous) Intersection (aeronautics) Civil and Structural Engineering Mathematics |
| Zdroj: | Innovative Infrastructure Solutions. 6 |
| ISSN: | 2364-4184 2364-4176 |
| DOI: | 10.1007/s41062-021-00569-y |
| Popis: | This paper investigates the safety benefit of standard versus nonstandard lighting ones using the cross-sectional method to develop associate crash modification factor (CMF). Forty urban intersections were involved in this study. Initially, a proper number of explanatory variables determined using the Pearson correlation measure. After that, a negative binomial regression method was employed as a safety performance function to estimate the expected frequency of crashes. Using Omnibus test of model validity, the applied safety performance function was approved. According to predefined thresholds, the 40 studied sites were binary classified into two groups: standard versus nonstandard sites. The crash modification factor was then estimated as the division of the expected number of nighttime crash frequencies of lighted intersections to unlighted ones resulting in CMF equal to 0.785, implying 23.5% safety benefit of urban intersection standard lighting provision. |
| Databáze: | OpenAIRE |
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