Research Article
Development of a Safety Evaluation Model for Provincial Highway
Table 12
Calculation and scoring method according to assessment items.
| Index | Subindex | Assessment element | Standard | Score |
| Geometric feature () | Horizontal curve () | Number of curve sections (%) | Under 10 | ≤40 | 10–20 | ≤60 | 20–30 | ≤80 | 30–50 | ≤100 | Sight distance () | Number of sight distance defect sections (%) | Under 10 | ≤40 | 10–20 | ≤60 | 20–30 | ≤80 | 30–50 | ≤100 | Longitudinal slop () | Number of longitudinal slope sections (%) | Under 10 | ≤40 | 10–20 | ≤60 | 20–30 | ≤80 | 30–50 | ≤100 | Lane width () | Mean lane width (m) | 3.5–3.75 | ≤40 | 3.25–3.5 | ≤60 | 3–3.25 | ≤80 | Under 3.25 | ≤100 | Shoulder width () | Mean of shoulder width (m) | Nonpavement | 100 | 0–1.5 | Interpolation | Above 1.5 | — |
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