This study investigated the crash contributing factors to the injury
outcomes and the characteristics of the night time crashes at freeway mainline segments.
Multinomial logit model (MNL) was selected to estimate the explanatory
variables at a 95% confidence level. The six-year crash data (2005-2010) were
obtained in the State of Florida, USA and five injury level outcomes, no
injury, possible injury, non-incapacitating injury, capacitating injury, and fatal
injury, were considered. The no injury level was selected as the baseline
category.
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