Discrete Dynamics in Nature and Society / 2020 / Article / Tab 1

Research Article

A Crash Severity Prediction Method Based on Improved Neural Network and Factor Analysis

Table 1

Summary of the selected variables.

CategoryVariablesValue definition

Nonroad(1) Accident type, (2) month, and (3) weekdayCategorical, categorical, and categorical
(4) Location type, (5) light, and (6) Driver sexCategorical, categorical, and categorical
(7) Driver age, (8) driver restrain, and (9) vehicle yearContinuous, categorical, and categorical
(10) Vehicle type and (11) weatherCategorical and categorical

Road(12) Road characteristics and (13) road surfaceCategorical and categorical
(14) Road functional class and (15) curve angleCategorical and continuous
(16) Curve direction and (17) gradient directionCategorical and categorical
(18) Gradient percentage and (19) curve radiusContinuous and continuous
(20) Curve degreeContinuous

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