Table 2 Details of independent variables with descriptions and frequency counts.
Factor’s Characteristics | Independent Variables | Variable Description | Frequency (%) per Severity Level | |||
|---|---|---|---|---|---|---|
No Injury | Possible Injury | Minor Injury | Serious Injury | |||
Personal Characteristics | Occupant_ Age (Years) | ≤ 20 / 20–29 / 30–39 / 40–49 / 50–59 / ≥ 60 | 6.6/15.6/14.7/15.4/12.2/7.7 | 2.1/4.4/3.1/2.7/2.1/1.7 | 0.9/2.6/1.6/1.3/1.2/1.0 | 0.3/0.2/0.5/0.4/0.31/0.35 |
Gender | Female / Male | 14.9/57.33 | 8.04/7.95 | 4.35/4.51 | 1.22/1.73 | |
Alcohol_ Involvement | Alcohol Not Involved / Alcohol Involved | 71.24/0.96 | 15.58/0.41 | 8.35/0.51 | 2.55/0.39 | |
Drugs_ Involvement | Drugs Not Involved / Drugs Involved | 72.11/0.10 | 15.98/0.01 | 8.80/0.05 | 2.84/0.09 | |
Bag_ Deployment | Bag Deployed / Bag not Deployed | 67.28/4.92 | 13.26/2.73 | 6.05/2.80 | 1.62/1.32 | |
Temporal Characteristics | Month_of_ Year | Jan. / Feb. / March / April / May / June / July / Aug. / Sept. / Oct. / Nov. / Dec. | 6.7/4.79/4.97/5.13/6.21/6.64/5.73/5.95/6.0/7.21/6.13/5.8 | 1.30/1.18/1.59/1.21/1.21/1.25/1.45/1.3/1.5/1.65/1.2/1.18 | 0.65/0.56/0.63/0.8/0.96/0.9/0.75/0.8/0.75/0.77/0.64/0.6 | 0.25/0.16/0.23/0.22/0.3/0.27/0.30/0.3/0.2/0.28/0.27/0.18 |
Type_of_Day | Weekend / Weekdays | 8.52/63.68 | 1.69/14.30 | 1.24/7.61 | 0.62/2.32 | |
Time_of_Day | Night / Day | 15.06/57.1 | 2.95/13.05 | 2.84/6.02 | 1.42/1.53 | |
Environmental Characteristics | Weather_ Condition | Clear / Rain / Snow, Hail / Fog, Smog, Cloudy / Others | 53.7/6.74/2.18/8.97/ 0.61 | 12.1/1.61/0.36/1.82/ 0.11 | 6.91/0.80/0.16/0.95/ 0.04 | 2.24/0.26/0.08/0.34/ 0.02 |
Light_ Condition | Day light / Dark_ road lights / Dark_ no road light / Others | 56.56/9.29 /4.24 / 2.11 | 12.80/2.03 /0.77 /0.39 | 6.09/1.49 /0.94 /0.34 | 1.51/0.79 /0.53 / 0.13 | |
Road Characteristics | Road_Profile | Level / Grade / Others (Up/Down, Sag, Hillcrest) | 48.81/11.04/12.36 | 11.31/2.05/2.63 | 6.64/1.28/ 0.94 | 2.06/0.57/ 0.31 |
Road_ Alignment | Straight / Curve / Others (non-traffic way, driveway access) | 66.62/3.52/2.06 | 14.62/0.98/0.40 | 8.28/0.41/ 0.16 | 2.80/0.11/ 0.04 | |
Road_ Surface_ Condition | Dry / Wet / Others (Sand, Dirt, Slush) | 58.75/13.0/ 0.45 | 13.91/2.76/0.04 | 7.42/1.41/ 0.02 | 2.49/0.45/ 0.01 | |
Road_ Traffic_Way | 2-Way Not-divided / 2-Way Divided / Others | 18.36/40.31/13.54 | 3.98/8.84/ 3.17 | 1.68/6.36/ 0.82 | 0.52/2.08/ 0.36 | |
Road_ Junctions | No-Intersection / Intersection / Others | 39.88/30.90/1.42 | 8.68/7.06/ 0.25 | 5.53/2.97/ 0.36 | 2.03/0.85/ 0.06 | |
Road_Work_ Zone | No-Work Zone / Work Zone / Others | 68.78/2.35/1.08 | 15.10/0.63/0.26 | 8.50/0.33/ 0.03 | 2.76/0.15/ 0.03 | |
Vehicular Characteristics | Vehicle_Age (Years) | ≤ 9 / 10–19 / 20–29 / ≥ 30 | 47.85/21.8/2.24/0.33 | 9.82/5.78/ 0.37/0.02 | 4.85/3.62/ 0.37/0.01 | 1.77/0.99/ 0.16/0.03 |
Accident_ Type | Not Rollover / Rollover / Others | 72.02/0.19/0.0 | 15.76/0.17/0.05 | 8.59/0.25/ 0.02 | 2.75/0.17/ 0.02 | |
