Research Article
Determination of Curve Speed Zones for Mountainous Freeways
Table 2
The basic characteristics of the curve section.
| Road type | Design speed (km/h) | Curve radius (m) | Maximum slope (%) | Average slope (%) |
| Expressway | 80 | 220 | −2.7% | −1.6% | Expressway | 80 | 270 | 3.1% | 2.6% | Expressway | 80 | 325 | 3.2% | 2.8% | Expressway | 80 | 620 | 2.1% | 1.7% | Expressway | 80 | 680 | 3.7% | 2.9% | Expressway | 80 | 470 | 2.5% | 1.4% | Expressway | 80 | 570 | −3.7% | −1.8% | Expressway | 80 | 375 | 1.9% | 0.8% | Expressway | 120 | 570 | −2.7% | −1.9% | Expressway | 120 | 375 | 3.2% | 2.5% | Expressway | 120 | 470 | 3.8% | 2.8% | Expressway | 120 | 680 | −2.9% | −1.8% | Expressway | 120 | 270 | −3.5% | −2.6% | Expressway | 120 | 325 | 2.9% | 1.7% | Expressway | 120 | 620 | 3.2% | 2.1% | Expressway | 120 | 220 | 3.3% | 2.2% |
|
|