Highway Traffic Crash Risk Prediction Method considering Temporal Correlation Characteristics

Table 1

The statistics of initial variables.

Optional initial variable	Variable naming
Detector original variable	OSU1, OVU1, OOU1, OSU2, OVU2, OOU2, OSD1, OVD1, OOD1, OSD2, OVD2, OOD2
The difference between the variables of upstream and downstream detectors	DSU1D1, DVU1D1, DOU1D1, DSU2D1, DVU2D1, DOU2D1, DSU1D2, DVU1D2, DOU1D2, DSU2D2, DVU2D2, DOU2D2
Mean values of variables of upstream and downstream detectors	ASU1U2, AVU1U2, AOU1U2, ASD1D2, AVD1D2, AOD1D2