Driver, roadway, and weather factors on severity of lane departure crashes in Maine

Sawtelle, Alainie; Shirazi, Mohammadali; Gårder, Per; Rubin, Jonathan

doi:10.1016/j.jsr.2022.11.006

Cited by 8 publications

(1 citation statement)

References 18 publications

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“…As shown by the CMFs of SMR, the percentage of light/medium rainfall in a season significantly impacts the safety of CS, SAS, SS, and THS (as shown in Table 9 and Figure 6), with these impacts being more pronounced for interchange segments: when the SMR is reduced from 40% to 10%, the average crash rates reduce by 65.38%, 74.89%, 39.55%, and 23.27% for CS, SAS, SS, and THS, respectively. Sawtelle et al (2023) [44] showed that the monthly average daily precipitation on Chinese freeways is positively correlated with crash frequency, supporting this paper's view. In fact, the impacts of rain on freeway safety are mainly reflected in (1) reduced visibility for drivers, thus compressing the space for safe operation, and (2) reduced traction between the road surface and tires, especially in segments with more heavy vehicles, which are more likely to lose control.…”

Section: Weather Conditionssupporting

confidence: 77%

Estimation of Crash Modification Factors (CMFs) in Mountain Freeways: Considering Temporal Instability in Crash Data

Zhang,

Huang,

Kuang

et al. 2024

Sustainability

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The combined contributions to mountain freeway safety of pavement performance, weather conditions, and traffic condition indicators have not been thoroughly investigated due to the complexity of their interactions and temporal instability. A cross-sectional analysis using a Generalized Linear Model (GLM) approach with negative binomial distribution considering time-correlation effects (TC-NB) was adopted to estimate the Crash Modification Factors (CMFs) of these indicators for different segment types, alignment types, and cross-sectional forms based on eight quarters of data from mountain freeways in China. According to the results, improving the pavement performance indexes positively impacts the safety of different freeway segments, especially for the curved segments. Quarterly Average Daily Traffic (QADT) has significantly negative safety effects on two-lane segments with relatively narrow spaces, while the proportion of large vehicles plays a decisive role in the safety impacts of tunnel segments. Small/moderate rain days in a quarter (SMR) were significantly positively correlated with crash frequency, while the percentage of torrential rain days in a quarter (TR) showed an opposite trend. The results of this study contribute to the effective coordination of traffic monitoring systems, pavement management systems, and traffic safety management systems to develop targeted improvement countermeasures for different freeway section types.

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Section: Weather Conditionssupporting

confidence: 77%