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Table 2 Descriptive statistics of the database for violation analysis: violation frequencies
Indicator | Drivers' group, period | Mean | s.d. | min | max |
|---|---|---|---|---|---|
Violations' number per driver | Treatment, before | 2.95 | 1.52 | 1 | 28 |
Treatment, after | 1.03 | 1.44 | 0 | 28 | |
Comparison, before | 0.26 | 0.50 | 0 | 4 | |
Comparison, after | 0.30 | 0.53 | 0 | 4 | |
Violation rate per 1,000 days (v2time) | Treatment, before | 3.40 | 2.17 | 0.9 | 100.0 |
Treatment, after | 0.94 | 1.32 | 0 | 25.5 | |
Comparison, before | 0.28 | 0.59 | 0 | 26.3 | |
Comparison, after | 0.27 | 0.48 | 0 | 4.0 |