Research Article
Quantification of Rear-End Crash Risk and Analysis of Its Influencing Factors Based on a New Surrogate Safety Measure
Table 5
Significant main effects for rear-end crash risk.
| Variables | Statistical results | Dummy variables | Rear-end crash risk | Mean | Std. Dev. |
| Day-of-week | F = 58.1, | Holiday | 0.0028 | 0.0031 | Workday | 0.0032 | 0.0033 |
| Time-of-day | F = 18.5, | Off peak | 0.0030 | 0.0033 | Morning peak | 0.0034 | 0.0033 | Evening peak | 0.0032 | 0.0032 |
| Light condition | F = 8.8, | Daytime | 0.0032 | 0.0032 | Nighttime | 0.0030 | 0.0034 | Weather condition | F = 0.7, | — | — | — |
| Traffic density | F = 1655.0, | High | 0.0049 | 0.0027 | Median | 0.0049 | 0.0033 | Low | 0.0021 | 0.0029 |
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