Research Article
Bayesian Hierarchical Modeling Monthly Crash Counts on Freeway Segments with Temporal Correlation
Table 1
Vehicle categorization.
| | Category | Categorization criteria | Representative vehicle types | | Head height | Number of axes | Number of wheels | Wheelbase |
| | | <1.3 | 2 | 2–4 | <3.2 | Passenger car, jeep, taxi-head truck | | | ⩾1.3 | 2 | 4 | ⩾3.2 | Minibus, minivan, light truck | | | ⩾1.3 | 2 | 6 | ⩾3.2 | Medium bus, large normal bus, medium truck | | | ⩾1.3 | 3 | 6–10 | ⩾3.2 | Large luxury bus, large truck, large trailer, 20-foot container vehicle | | | ⩾1.3 | >3 | >10 | ⩾3.2 | Heavy truck, heavy trailer, 40-foot container vehicle |
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