کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4978681 1452893 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Another look at the safety effects of horizontal curvature on rural two-lane highways
ترجمه فارسی عنوان
نگاه دیگر به اثرات ایمنی انحنای افقی در بزرگراه های دوجانبه روستایی است
کلمات کلیدی
مدل های پیش بینی سقوط، مسطح کردن منحنی، عوامل اصلاح تصادف منحنی افقی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی
Crash Modification Factors (CMFs) are used to represent the effects on crashes of changes to highway design elements and are usually obtained from observational studies based on reported crashes. The design element of interest for this paper is horizontal curvature on rural 2-lane highways. The data for this study came from the Washington State database in the Highway Safety Information System (HSIS). Crash prediction models are developed for curve sections on rural 2-lane highway and the tangent sections up- and down-stream of the curve sections. Different negative binomial models were developed for segments on level grades (<3%), moderate grades (3-6%), and steep grades (>6%) to account for the confounding effects of gradient. The relationships between crashes at different traffic volumes and deflection angles are explored to illustrate how to get estimates of CMFs for increases in the minimum radius, considering the effect of increased tangent length for sharper curves, an effect that is overlooked in the Highway Safety Manual CMF, in addition to the effect of gradient. The results of that exploration indicated that even at different design speeds and deflection angles, the CMF estimates for incremental increases in radius lie within the same range, and that the crash reduction rate (CRR) is higher at segments on higher grades compared to the ones on lower grades.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Accident Analysis & Prevention - Volume 106, September 2017, Pages 149-159
نویسندگان
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